adjust slightly for JSON parsing; add comment about JSON

diff --git a/dygraph.js b/dygraph.js
index 5a42728..db388f7 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -3617,7 +3617,8 @@ Dygraph.GVizChart.prototype.getSelection = function() {
 DateGraph = Dygraph;
 
 // <REMOVE_FOR_COMBINED>
-Dygraph.OPTIONS_REFERENCE = {
+Dygraph.OPTIONS_REFERENCE =  // <JSON>
+{
   "includeZero": {
     "type": "boolean",
     "default": "false",
@@ -3939,7 +3940,11 @@ Dygraph.OPTIONS_REFERENCE = {
     "default": "",
     "description": ""
   }
-};
+}
+;  // </JSON>
+// NOTE: in addition to parsing as JS, this snippet is expected to be valid
+// JSON. This assumption cannot be checked in JS, but it will be checked when
+// documentation is generated by the generate-documentation.py script.
 
 // Do a quick sanity check on the options reference.
 (function() {