Rename match to match_text for lexer user code blocks

spec/rewind.c.propane

@@ -14,7 +14,7 @@ token repeat /repeat/;
 token lbrace /\{/;
 token rbrace /\}/;
 token plus /\+/;
-token num /\d+/ << char b[32]; memcpy(b, match, match_length); b[match_length] = '\0'; $$ = atoi(b); >>
+token num /\d+/ << char b[32]; memcpy(b, match_text, match_length); b[match_length] = '\0'; $$ = atoi(b); >>
 
 Start -> Statements;
 Statements -> ;