bashrc_repo: use _is_posix.

Artoria2e5 · Artoria2e5 · commit ad4a8e1e606e · 2015-06-23T17:28:34.000+08:00
diff --git a/bashrc.d/bashrc_repo b/bashrc.d/bashrc_repo
@@ -5,7 +5,7 @@
 # Long-term TODO: svn, vns and bzr.
 
 # We are not POSIX-compatible.
-shopt -oq posix && return
+_is_posix && return
 
 # Get functions
 . /etc/bashrc.d/.bashrc_git &>/dev/null
