Added the git pre-push file.

Added the git pre-push file. Please take a look.
For future reference this line and the previous line will both work.

What changed was you went from [[ to [, which has two side effects
1. You need to quote your variables to protect against empty values and hence [ "$var_name" == "$var2_name"]
2. In [[ the = and == are the same, but switching to [ forces you to go to ==