[2.7] make PatternCompiler use the packaged grammar if possible (more bpo-24960) (GH-5034)#5037

benjaminp merged 1 commit intopython:2.7python/cpython:2.7from

miss-islington:backport-e5f7dcc-2.7miss-islington/cpython:backport-e5f7dcc-2.7Copy head branch name to clipboard