Keywords

Syntax
Keyword:
"until"
| "end"
| "if"
| "then"
| "else"
| "elsif"
| "in"
| "for"
| "do"
| "return"
| "break"
| "continue"
| "loop"
| "def"
| "fn"
| "begin"
| "and"
| "or"
| "not"
| "fn"
| "is" | "require"