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// CodeMirror, copyright (c) by Marijn Haverbeke and others

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// Distributed under an MIT license: http://codemirror.net/LICENSE

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(function(mod) {

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if (typeof exports == "object" && typeof module == "object") // CommonJS

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mod(require("../../lib/codemirror"));

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else if (typeof define == "function" && define.amd) // AMD

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define(["../../lib/codemirror"], mod);

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else // Plain browser env

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mod(CodeMirror);

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})(function(CodeMirror) {

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"use strict";

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CodeMirror.defineMode("ruby", function(config) {

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function wordObj(words) {

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var o = {};

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for (var i = 0, e = words.length; i < e; ++i) o[words[i]] = true;

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return o;

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}

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var keywords = wordObj([

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"alias", "and", "BEGIN", "begin", "break", "case", "class", "def", "defined?", "do", "else",

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"elsif", "END", "end", "ensure", "false", "for", "if", "in", "module", "next", "not", "or",

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"redo", "rescue", "retry", "return", "self", "super", "then", "true", "undef", "unless",

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"until", "when", "while", "yield", "nil", "raise", "throw", "catch", "fail", "loop", "callcc",

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"caller", "lambda", "proc", "public", "protected", "private", "require", "load",

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"require_relative", "extend", "autoload", "__END__", "__FILE__", "__LINE__", "__dir__"

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]);

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var indentWords = wordObj(["def", "class", "case", "for", "while", "until", "module", "then",

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"catch", "loop", "proc", "begin"]);

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var dedentWords = wordObj(["end", "until"]);

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var matching = {"[": "]", "{": "}", "(": ")"};

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var curPunc;

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function chain(newtok, stream, state) {

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state.tokenize.push(newtok);

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return newtok(stream, state);

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}

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function tokenBase(stream, state) {

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if (stream.sol() && stream.match("=begin") && stream.eol()) {

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state.tokenize.push(readBlockComment);

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return "comment";

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}

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if (stream.eatSpace()) return null;

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var ch = stream.next(), m;

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if (ch == "`" || ch == "'" || ch == '"') {

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return chain(readQuoted(ch, "string", ch == '"' || ch == "`"), stream, state);

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} else if (ch == "/") {

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var currentIndex = stream.current().length;

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if (stream.skipTo("/")) {

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var search_till = stream.current().length;

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stream.backUp(stream.current().length - currentIndex);

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var balance = 0; // balance brackets

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while (stream.current().length < search_till) {

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var chchr = stream.next();

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if (chchr == "(") balance += 1;

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else if (chchr == ")") balance -= 1;

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if (balance < 0) break;

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}

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stream.backUp(stream.current().length - currentIndex);

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if (balance == 0)

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return chain(readQuoted(ch, "string-2", true), stream, state);

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}

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return "operator";

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} else if (ch == "%") {

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var style = "string", embed = true;

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if (stream.eat("s")) style = "atom";

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else if (stream.eat(/[WQ]/)) style = "string";

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else if (stream.eat(/[r]/)) style = "string-2";

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else if (stream.eat(/[wxq]/)) { style = "string"; embed = false; }

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var delim = stream.eat(/[^\w\s=]/);

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if (!delim) return "operator";

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if (matching.propertyIsEnumerable(delim)) delim = matching[delim];

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return chain(readQuoted(delim, style, embed, true), stream, state);

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} else if (ch == "#") {

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stream.skipToEnd();

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return "comment";

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} else if (ch == "<" && (m = stream.match(/^<-?[\`\"\']?([a-zA-Z_?]\w*)[\`\"\']?(?:;|$)/))) {

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return chain(readHereDoc(m[1]), stream, state);

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} else if (ch == "0") {

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if (stream.eat("x")) stream.eatWhile(/[\da-fA-F]/);

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else if (stream.eat("b")) stream.eatWhile(/[01]/);

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else stream.eatWhile(/[0-7]/);

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return "number";

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} else if (/\d/.test(ch)) {

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stream.match(/^[\d_]*(?:\.[\d_]+)?(?:[eE][+\-]?[\d_]+)?/);

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return "number";

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} else if (ch == "?") {

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while (stream.match(/^\\[CM]-/)) {}

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if (stream.eat("\\")) stream.eatWhile(/\w/);

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else stream.next();

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return "string";

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} else if (ch == ":") {

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if (stream.eat("'")) return chain(readQuoted("'", "atom", false), stream, state);

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if (stream.eat('"')) return chain(readQuoted('"', "atom", true), stream, state);

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// :> :>> :< :<< are valid symbols

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if (stream.eat(/[\<\>]/)) {

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stream.eat(/[\<\>]/);

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return "atom";

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}

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// :+ :- :/ :* :| :& :! are valid symbols

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if (stream.eat(/[\+\-\*\/\&\|\:\!]/)) {

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return "atom";

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}

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// Symbols can't start by a digit

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if (stream.eat(/[a-zA-Z$@_\xa1-\uffff]/)) {

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stream.eatWhile(/[\w$\xa1-\uffff]/);

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// Only one ? ! = is allowed and only as the last character

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stream.eat(/[\?\!\=]/);

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return "atom";

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}

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return "operator";

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} else if (ch == "@" && stream.match(/^@?[a-zA-Z_\xa1-\uffff]/)) {

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stream.eat("@");

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stream.eatWhile(/[\w\xa1-\uffff]/);

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return "variable-2";

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} else if (ch == "$") {

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if (stream.eat(/[a-zA-Z_]/)) {

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stream.eatWhile(/[\w]/);

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} else if (stream.eat(/\d/)) {

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stream.eat(/\d/);

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} else {

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stream.next(); // Must be a special global like $: or $!

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}

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return "variable-3";

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} else if (/[a-zA-Z_\xa1-\uffff]/.test(ch)) {

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stream.eatWhile(/[\w\xa1-\uffff]/);

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stream.eat(/[\?\!]/);

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if (stream.eat(":")) return "atom";

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return "ident";

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} else if (ch == "|" && (state.varList || state.lastTok == "{" || state.lastTok == "do")) {

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curPunc = "|";

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return null;

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} else if (/[\[\]{}\\;]/.test(ch)) {

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curPunc = ch;

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return null;

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} else if (ch == "-" && stream.eat(">")) {

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return "arrow";

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} else if (/[=+\-\/*:\.^%<>~|]/.test(ch)) {

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var more = stream.eatWhile(/[=+\-\/*:\.^%<>~|]/);

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if (ch == "." && !more) curPunc = ".";

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return "operator";

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} else {

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return null;

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}

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}

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function tokenBaseUntilBrace(depth) {

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if (!depth) depth = 1;

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return function(stream, state) {

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if (stream.peek() == "}") {

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if (depth == 1) {

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state.tokenize.pop();

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return state.tokenize[state.tokenize.length-1](stream, state);

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} else {

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state.tokenize[state.tokenize.length - 1] = tokenBaseUntilBrace(depth - 1);

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}

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} else if (stream.peek() == "{") {

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state.tokenize[state.tokenize.length - 1] = tokenBaseUntilBrace(depth + 1);

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}

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return tokenBase(stream, state);

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};

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}

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function tokenBaseOnce() {

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var alreadyCalled = false;

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return function(stream, state) {

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if (alreadyCalled) {

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state.tokenize.pop();

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return state.tokenize[state.tokenize.length-1](stream, state);

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}

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alreadyCalled = true;

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return tokenBase(stream, state);

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};

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}

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function readQuoted(quote, style, embed, unescaped) {

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return function(stream, state) {

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var escaped = false, ch;

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if (state.context.type === 'read-quoted-paused') {

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state.context = state.context.prev;

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stream.eat("}");

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}

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while ((ch = stream.next()) != null) {

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if (ch == quote && (unescaped || !escaped)) {

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state.tokenize.pop();

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break;

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}

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if (embed && ch == "#" && !escaped) {

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if (stream.eat("{")) {

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if (quote == "}") {

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state.context = {prev: state.context, type: 'read-quoted-paused'};

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}

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state.tokenize.push(tokenBaseUntilBrace());

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break;

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} else if (/[@\$]/.test(stream.peek())) {

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state.tokenize.push(tokenBaseOnce());

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break;

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}

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}

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escaped = !escaped && ch == "\\";

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}

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return style;

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};

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}

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function readHereDoc(phrase) {

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return function(stream, state) {

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if (stream.match(phrase)) state.tokenize.pop();

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else stream.skipToEnd();

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return "string";

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};

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}

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function readBlockComment(stream, state) {

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if (stream.sol() && stream.match("=end") && stream.eol())

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state.tokenize.pop();

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stream.skipToEnd();

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return "comment";

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}

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return {

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startState: function() {

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return {tokenize: [tokenBase],

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indented: 0,

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context: {type: "top", indented: -config.indentUnit},

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continuedLine: false,

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lastTok: null,

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varList: false};

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token: function(stream, state) {

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curPunc = null;

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if (stream.sol()) state.indented = stream.indentation();

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var style = state.tokenize[state.tokenize.length-1](stream, state), kwtype;

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var thisTok = curPunc;

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if (style == "ident") {

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var word = stream.current();

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style = state.lastTok == "." ? "property"

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: keywords.propertyIsEnumerable(stream.current()) ? "keyword"

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: /^[A-Z]/.test(word) ? "tag"

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: (state.lastTok == "def" || state.lastTok == "class" || state.varList) ? "def"

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: "variable";

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if (style == "keyword") {

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thisTok = word;

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if (indentWords.propertyIsEnumerable(word)) kwtype = "indent";

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else if (dedentWords.propertyIsEnumerable(word)) kwtype = "dedent";

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else if ((word == "if" || word == "unless") && stream.column() == stream.indentation())

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kwtype = "indent";

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else if (word == "do" && state.context.indented < state.indented)

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kwtype = "indent";

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}

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}

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if (curPunc || (style && style != "comment")) state.lastTok = thisTok;

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if (curPunc == "|") state.varList = !state.varList;

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if (kwtype == "indent" || /[\(\[\{]/.test(curPunc))

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state.context = {prev: state.context, type: curPunc || style, indented: state.indented};

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else if ((kwtype == "dedent" || /[\)\]\}]/.test(curPunc)) && state.context.prev)

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state.context = state.context.prev;

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if (stream.eol())

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state.continuedLine = (curPunc == "\\" || style == "operator");

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return style;

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indent: function(state, textAfter) {

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if (state.tokenize[state.tokenize.length-1] != tokenBase) return 0;

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var firstChar = textAfter && textAfter.charAt(0);

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var ct = state.context;

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var closing = ct.type == matching[firstChar] ||

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return ct.indented + (closing ? 0 : config.indentUnit) +

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(state.continuedLine ? config.indentUnit : 0);

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electricInput: /^\s*(?:end|rescue|\})$/,

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lineComment: "#"

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};

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});

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CodeMirror.defineMIME("text/x-ruby", "ruby");

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});

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