Merge pull request #19 from jabraham17/syntax-highlight-gen-conversion

Make sure %? is syntax highlighted

Author: jabraham17

Diff for: syntaxes/chapel.tmLanguage.json

@@ -166,6 +166,10 @@
     },
     "string_format": {
       "patterns": [
+        {
+          "match": "(%\\?)",
+          "name": "constant.other.placeholder.chapel"
+        },
         {
           "match": "(%[{]([#]+|[#]*[.][#]+)[}])",
           "name": "constant.other.placeholder.chapel"