Allow dotted form of postfix operator after unary postfix hyper opera…

…tor, but only for non-wordy operators

The previous version which special cased postfix:<i> only seemed too fragile.
Now the dotted form is allowed only for non-wordy operators.

src/Perl6/Grammar.nqp

@@ -3695,7 +3695,7 @@ grammar Perl6::Grammar is HLL::Grammar does STD {
         [ ['.' <.unsp>?]? <postfix_prefix_meta_operator> <.unsp>?]**0..1
         [
         | <OPER=postfix>
-        | '.' <![i]> <OPER=postfix>  ## postfix operator called as method, but not postfix:<i>
+        | '.' <?before \W> <OPER=postfix>  ## dotted form of postfix operator (non-wordy only)
         | <OPER=postcircumfix>
         | <OPER=dotty>
         | <OPER=privop>