Merge pull request #1038 from samcv/signal

Document that identifiers like `'` and `-` can't be used after Q q, or qq quoting constructs

Author: zoffixznet

doc/Language/quoting.pod6

@@ -23,6 +23,18 @@ Delimiters can be nested, but in the plain C<Q> form, backslash escapes
 aren't allowed.  In other words, basic C<Q> strings are as literal as
 possible.
 
+Some delimiters are not allowed immediately after C<Q>',
+C<q> or C<qq>. Any characters that are allowed in
+L<identifiers|language/syntax#Identifiers>
+are not allowed to be used. For example, C<'> and C<->.
+In addition, C<( )> is not allowed because that looks
+like a function call.
+
+=for code :allow<B>
+B<Q'>this will not work!B<'>
+B<Q(>this won't work either!B<)>
+B<Q (>this is fineB<)>
+
 =for code :allow<B>
 Q<Make sure you B«<»matchB«>» opening and closing delimiters>
 Q{This is still a closing curly brace → B<\>}