Fixes #519
Fixes #519

Signed-off-by: Terence Parr <275b89323d950c58c02f5ad8c33bac7ecb40d004@antlr.org>

antlr/intellij-plugin-v4,parrt/intellij-plugin-v4,antlr/intellij-plugin-v4,parrt/intellij-plugin-v4