Readd 'expect' as explicit choice in simple_identifier

Apparently, tree-sitter resolves conflicts by match specificity where
e.g. literal strings are given a higher precedence than regexes. To
prevent this, we readd 'expect' as an explicit choice to
simple_identifier.

Author: fwcd

.gitignore

@@ -3,6 +3,7 @@
 .idea
 bin
 build
+local
 node_modules
 *.swp
 *.wasm

grammar.js

@@ -1008,7 +1008,11 @@ module.exports = grammar({
     // Identifiers
     // ==========
 
-    simple_identifier: $ => $._lexical_identifier,
+    simple_identifier: $ => choice(
+      $._lexical_identifier,
+      "expect"
+      // TODO: More soft keywords
+    ),
 
     identifier: $ => sep1($.simple_identifier, "."),
 

src/grammar.json

@@ -5051,8 +5051,17 @@
       ]
     },
     "simple_identifier": {
-      "type": "SYMBOL",
-      "name": "_lexical_identifier"
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "_lexical_identifier"
+        },
+        {
+          "type": "STRING",
+          "value": "expect"
+        }
+      ]
     },
     "identifier": {
       "type": "SEQ",