Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the
    best of my knowledge, is covered under an appropriate open
    source license and I have the right under that license to
    submit that work with modifications, whether created in whole
    or in part by me, under the same open source license (unless
    I am permitted to submit under a different license), as
    Indicated in the file; or

(c) The contribution was provided directly to me by some other
    person who certified (a), (b) or (c) and I have not modified
    it.

(d) I understand and agree that this project and the contribution
    are public and that a record of the contribution (including
    all personal information I submit with it, including my
    sign-off) is maintained indefinitely and may be redistributed
    consistent with this project or the open source license(s)
    involved.

Signed-off-by: cyclotron3k <aidan.samuel@gmail.com>

This change fixes the warning:

Users/USER/rvm/gems/ruby-2.7.0-rc1@ruby2.7-no-rails/gems/git-1.5.0/lib/git/branch.rb:40:
warning: parentheses after method name is interpreted as an argument list, not a decomposed argument

This fix was originally proposed by @jasnow

Signed-off-by: James Couball <jcouball@yahoo.com>

The intent was to structure the instructions better without making
actual changes to the contribution rules.

Signed-off-by: James Couball <jcouball@yahoo.com>

Add instructions for releasing the git gem
Signed-off-by: James Couball <jcouball@yahoo.com>

Signed-off-by: James Couball <jcouball@yahoo.com>