store paths are now arrays, because '.' needed to be a valid path ident. more quoting crap. font is done! well.. it's something. probably not 'done'

src/ast.ts

@@ -309,5 +309,5 @@ function prettyPrintPattern(pattern: Pattern): string {
 }
 
 function needsQuotes(key: string): boolean {
-    return !/^[a-zA-Z_][a-zA-Z0-9_]*$/.test(key);
+    return key === '_' || !/^[a-zA-Z_][a-zA-Z0-9_]*$/.test(key);
 }