# strings from lex_identifier
"!"
"?"
"|"
"="
"=="
":"
"defined?"
"<<"
"~"
">"
"<"
"!="
"{"
"}"
"["
"]"
"do"
"if"
"in"
"or"
"and"
"def"
"end"
"END"
"for"
"nil"
"not"
"case"
"else"
"next"
"redo"
"self"
"then"
"true"
"when"
"alias"
"begin"
"BEGIN"
"break"
"class"
"elsif"
"false"
"retry"
"super"
"undef"
"until"
"while"
"yield"
"ensure"
"module"
"rescue"
"return"
"unless"
"__LINE__"
"__FILE__"
"__ENCODING__"
