.gitignore in acfs-0.16.0 vs .gitignore in acfs-0.17.0

@@ -2,10 +2,11 @@
 *.rbc
 .rbx
 .bundle
 .config
 .yardoc
-Gemfile.lock
+doc
+Gemfile*.lock
 InstalledFiles
 _yardoc
 coverage
 doc/
 lib/bundler/man