Bug reporting: help users create proper @rweb{Bug reports}, and/or
join the Bug Squad to organize @rcontrib{Issues}.
+@item
+@rcontrib{Grand Regression Test Checking}: verify that LilyPond works correctly
+by examining output of test snippets. Checking one snippet takes less
+than a minute!
+
@item
Documentation: small changes can be proposed by following the
guidelines for @rcontrib{Documentation suggestions}.