character lits, initial work on literal case trees

newt-vscode/syntaxes/newt.tmLanguage.json

@@ -17,6 +17,20 @@
     {
       "name": "keyword.newt",
       "match": "\\b(data|where|case|of|let|in|U|module|import|ptype|pfunc|infix|infixl|infixr)\\b"
+    },
+    {
+      "name": "string.js",
+      "begin": ":=\\s*\"",
+      "end": "\"",
+      "patterns": [
+        { "include": "source.js" }
+      ]
+    },
+    {
+      "name": "string.newt",
+      "begin": "\"",
+      "end": "\""
     }
+
   ]
 }