Wrap initializer code in generated parsers into |{...}|

Initializer code is usually indented and this indentation is carried
over to generated code. This resulted in a piece of indented code in the
middle of the parser.

This commit wraps initializer code in |{...}|, which makes indentation
in generated parsers look a bit more natural.

.jshintrc

@@ -10,5 +10,6 @@
   "noarg":    true,
   "noempty":  true,
   "nonew":    true,
-  "trailing": true
+  "trailing": true,
+  "-W082":    false
 }

lib/compiler/passes/generate-javascript.js

@@ -951,7 +951,7 @@ module.exports = function(ast, options) {
   }
 
   if (ast.initializer) {
-    parts.push(indent4(ast.initializer.code));
+    parts.push(indent4("{" + ast.initializer.code + "}"));
     parts.push('');
   }
 

lib/parser.js

@@ -4836,7 +4836,7 @@ module.exports = (function() {
       return s0;
     }
 
-
+    {
       var OPS_TO_PREFIXED_TYPES = {
         "$": "text",
         "&": "simple_and",
@@ -4883,7 +4883,7 @@ module.exports = (function() {
       function buildList(first, rest, index) {
         return [first].concat(extractList(rest, index));
       }
-
+    }
 
     peg$result = peg$startRuleFunction();