Displays wrong commands on initial screen in usage

[JacksonBailey]

See the second and third commands under "Usage". It should be diff-so-fancy instead of git diff.

Diff-so-fancy: https://github.com/so-fancy/diff-so-fancy
Version      : 1.1.1

Usage:

git diff --color | diff-so-fancy # Use d-s-f on one diff
git diff --colors                # View the commands to set the recommended colors
git diff --set-defaults          # Configure git-diff to use diff-so-fancy and suggested colors

# Configure git to use d-s-f for *all* diff operations
git config --global core.pager "diff-so-fancy | less --tabs=4 -RFX"

[stevemao]

PR welcome @JacksonBailey :)

[stevemao]

fixed by #256