Github user paulk-asert commented on the pull request:
https://github.com/apache/groovy/commit/7e7b508c02bf35e72fca1efcb7cc0d8a4f25038a#commitcomment-28347515
In src/antlr/GroovyLexer.g4:
In src/antlr/GroovyLexer.g4 on line 317:
But ''' and """ can quote themselves given the current grammar, so why not
the others? :-)---
