Parser: 91.7% of the corpus, operator symbols and #code statements

operatorSymbol now tries multi-token forms first, so 'operator *[]' is no longer
cut short by the bare '*'. '#code'/'#insert' take a whole statement, and a
statement that already consumed its ';' satisfies the enclosing declaration.

Ratchet 650/714.

src/main/kotlin/dev/hgh/jai/parser/JaiParserUtil.kt

@@ -237,8 +237,9 @@ object JaiParserUtil : GeneratedParserUtilBase() {
 
     /**
      * True if the previous token already closes a construct, so no `;` is needed:
-     * `}` ends a block, struct or enum body, and a here-string ends on its own
-     * terminator line (`BODY :: #string DONE … DONE`).
+     * `}` ends a block, struct or enum body, a here-string ends on its own terminator
+     * line (`BODY :: #string DONE … DONE`), and a `;` was already taken by a nested
+     * statement (`code :: #code a := 1;`).
      */
     @JvmStatic
     fun prevEndsConstruct(
@@ -249,7 +250,7 @@ object JaiParserUtil : GeneratedParserUtilBase() {
         while (true) {
             val t: IElementType = b.rawLookup(i) ?: return false
             if (t !== TokenType.WHITE_SPACE && t !== T.LINE_COMMENT && t !== T.BLOCK_COMMENT) {
-                return t === T.RBRACE || t === T.HERE_STRING
+                return t === T.RBRACE || t === T.HERE_STRING || t === T.SEMICOLON
             }
             i--
         }