Modifies the Git lib file (lib/git.zsh), adding three new prompt
methods:
- git_prompt_ahead(): Shows the content of the custom var
$ZSH_THEME_GIT_PROMPT_AHEAD if the local repository has
commits ahead from the remote origin repository
- git_prompt_short_sha(): Shows last commit SHA hash in short
mode wrapped between the content of the custom vars
$ZSH_THEME_GIT_PROMPT_SHA_BEFORE and
$ZSH_THEME_GIT_PROMPT_SHA_AFTER
- git_prompt_long_sha(): Shows last commit SHA hash in long
mode wrapped between the content of the custom vars
$ZSH_THEME_GIT_PROMPT_SHA_BEFORE and
$ZSH_THEME_GIT_PROMPT_SHA_AFTER
