Shell File Manager

If the file `.mailmap` exists at the toplevel of the repository, or at
the location pointed to by the mailmap.file or mailmap.blob
configuration options, it
is used to map author and committer names and email addresses to
canonical real names and email addresses.

In the simple form, each line in the file consists of the canonical
real name of an author, whitespace, and an email address used in the
commit (enclosed by '<' and '>') to map to the name. For example:
--
	Proper Name <[email protected]>
--

The more complex forms are:
--
	<[email protected]> <[email protected]>
--
which allows mailmap to replace only the email part of a commit, and:
--
	Proper Name <[email protected]> <[email protected]>
--
which allows mailmap to replace both the name and the email of a
commit matching the specified commit email address, and:
--
	Proper Name <[email protected]> Commit Name <[email protected]>
--
which allows mailmap to replace both the name and the email of a
commit matching both the specified commit name and email address.

Example 1: Your history contains commits by two authors, Jane
and Joe, whose names appear in the repository under several forms:

------------
Joe Developer <[email protected]>
Joe R. Developer <[email protected]>
Jane Doe <[email protected]>
Jane Doe <jane@laptop.(none)>
Jane D. <jane@desktop.(none)>
------------

Now suppose that Joe wants his middle name initial used, and Jane
prefers her family name fully spelled out. A proper `.mailmap` file
would look like:

------------
Jane Doe         <jane@desktop.(none)>
Joe R. Developer <[email protected]>
------------

Note how there is no need for an entry for `<jane@laptop.(none)>`, because the
real name of that author is already correct.

Example 2: Your repository contains commits from the following
authors:

------------
nick1 <[email protected]>
nick2 <[email protected]>
nick2 <[email protected]>
santa <[email protected]>
claus <[email protected]>
CTO <[email protected]>
------------

Then you might want a `.mailmap` file that looks like:
------------
<[email protected]>                       <[email protected]>
Some Dude <[email protected]>         nick1 <[email protected]>
Other Author <[email protected]>   nick2 <[email protected]>
Other Author <[email protected]>         <[email protected]>
Santa Claus <[email protected]> <[email protected]>
------------

Use hash '#' for comments that are either on their own line, or after
the email address.