Removed bad syntax: *? and +? no longer accepted by the grammar parser (Issue #511)

examples/lark.lark

@@ -33,7 +33,7 @@ name: RULE
     | TOKEN
 
 _VBAR: _NL? "|"
-OP: /[+*][?]?|[?](?![a-z])/
+OP: /[+*]|[?](?![a-z])/
 RULE: /!?[_?]?[a-z][_a-z0-9]*/
 TOKEN: /_?[A-Z][_A-Z0-9]*/
 STRING: _STRING "i"?

lark/load_grammar.py

@@ -73,7 +73,7 @@ TERMINALS = {
     '_RPAR': r'\)',
     '_LBRA': r'\[',
     '_RBRA': r'\]',
-    'OP': '[+*][?]?|[?](?![a-z])',
+    'OP': '[+*]|[?](?![a-z])',
     '_COLON': ':',
     '_COMMA': ',',
     '_OR': r'\|',