fix #379, escape of $ in template strings

lib/runtime/dart/_internal.js

 dart_library.library('dart/_internal', null, /* Imports */[
   "dart/_runtime",
   'dart/core',
   'dart/collection'
 ], /* Lazy imports */[
   'dart/math',
   'dart/_interceptors',
   'dart/_js_primitives'
 ], function(exports, dart, core, collection, math, _interceptors, _js_primitives) {
   'use strict';
@@ skipping 2357 matching lines @@
     }),
     names: ['getName', 'validatePublicSymbol', 'isValidSymbol']
   });
   Symbol.reservedWordRE = '(?:assert|break|c(?:a(?:se|tch)|lass|on(?:st|tinue))|d(?:efault|o)|' + 'e(?:lse|num|xtends)|f(?:alse|inal(?:ly)?|or)|i[fns]|n(?:ew|ull)|' + 'ret(?:hrow|urn)|s(?:uper|witch)|t(?:h(?:is|row)|r(?:ue|y))|' + 'v(?:ar|oid)|w(?:hile|ith))';
   Symbol.publicIdentifierRE = '(?!' + `${Symbol.reservedWordRE}` + '\\b(?!\\$))[a-zA-Z$][\\w$]*';
   Symbol.identifierRE = '(?!' + `${Symbol.reservedWordRE}` + '\\b(?!\\$))[a-zA-Z$_][\\w$]*';
   Symbol.operatorRE = '(?:[\\-+*/%&|^]|\\[\\]=?|==|~/?|<[<=]?|>[>=]?|unary-)';
   let POWERS_OF_TEN = dart.const([1.0, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, 10000000.0, 100000000.0, 1000000000.0, 10000000000.0, 100000000000.0, 1000000000000.0, 10000000000000.0, 100000000000000.0, 1000000000000000.0, 10000000000000000.0, 100000000000000000.0, 1000000000000000000.0, 10000000000000000000.0, 100000000000000000000.0, 1e+21, 1e+22]);
   dart.defineLazyProperties(Symbol, {
     get publicSymbolPattern() {
-      return core.RegExp.new(`^(?:${Symbol.operatorRE}$|${Symbol.publicIdentifierRE}(?:=?$|[.](?!$)))+?$`);
+      return core.RegExp.new(`^(?:${Symbol.operatorRE}\$|${Symbol.publicIdentifierRE}(?:=?\$|[.](?!\$)))+?\$`);
     },
     get symbolPattern() {
-      return core.RegExp.new(`^(?:${Symbol.operatorRE}$|${Symbol.identifierRE}(?:=?$|[.](?!$)))+?$`);
+      return core.RegExp.new(`^(?:${Symbol.operatorRE}\$|${Symbol.identifierRE}(?:=?\$|[.](?!\$)))+?\$`);
     }
   });
   // Exports:
   exports.EfficientLength = EfficientLength;
   exports.ListIterable$ = ListIterable$;
   exports.ListIterable = ListIterable;
   exports.SubListIterable$ = SubListIterable$;
   exports.SubListIterable = SubListIterable;
   exports.ListIterator$ = ListIterator$;
   exports.ListIterator = ListIterator;
@@ skipping 56 matching lines @@
   exports.ReversedListIterable = ReversedListIterable;
   exports.UnmodifiableListError = UnmodifiableListError;
   exports.NonGrowableListError = NonGrowableListError;
   exports.makeListFixedLength = makeListFixedLength;
   exports.Lists = Lists;
   exports.printToConsole = printToConsole;
   exports.Sort = Sort;
   exports.Symbol = Symbol;
   exports.POWERS_OF_TEN = POWERS_OF_TEN;
 });