zsh: enable completion support for chg as well
When verifying this change, you may need to clear/rebuild the completion cache;
I did this by deleting the ~/.zcompdump file and then starting a new shell.
Differential Revision: https://phab.mercurial-scm.org/D6574
--- a/contrib/zsh_completion Tue Jun 25 19:32:08 2019 -0700
+++ b/contrib/zsh_completion Tue Jun 25 14:23:02 2019 -0700
@@ -1,4 +1,4 @@
-#compdef hg
+#compdef hg chg
# Zsh completion script for mercurial. Rename this file to _hg and copy
# it into your zsh function path (/usr/share/zsh/site-functions for