fix git log message character issue

thierryxing · thierryxing · commit 22fbcb5a2491 · 2017-02-17T14:47:12.000+08:00
diff --git a/lib/git/lib.rb b/lib/git/lib.rb
@@ -859,7 +859,7 @@ def meets_required_version?
 
     def command_lines(cmd, opts = [], chdir = true, redirect = '')
       cmd_op = command(cmd, opts, chdir)
-      op.split("\n")
+      cmd_op.split("\n")
     end
 
     # Takes the current git's system ENV variables and store them.
