This tutorial covers how to add a new command to Git and, in the
process, everything from cloning git/git to getting reviewed on the
mailing list. It's meant for new contributors to go through
interactively, learning the techniques generally used by the git/git
development community.

Reviewed-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

During the course of review for MyFirstContribution.txt, the suggestion
came up to include anchors to make it easier for veteran contributors to
link specific sections of this documents to newbies. To make life easier
for reviewers, add these anchors in their own commit. See review context
here: https://public-inbox.org/git/20190507195938.GD220818@google.com/

AsciiDoc does not support :sectanchors: and the anchors are not
discoverable, but they are referenceable. So a link to
"foo.com/MyFirstContribution.html#prerequisites" will still work if that
file was generated with AsciiDoc. The inclusion of :sectanchors: does
not create warnings or errors while compiling directly with `asciidoc -b
html5 Documentation/MyFirstContribution.txt` or while compiling with
`make doc`.

AsciiDoctor does support :sectanchors: and displays a paragraph link on
mouseover. When the anchor is included above or inline with a section
(as in this change), the link provided points to the custom ID contained
within [[]] instead of to an autogenerated ID. Practically speaking,
this means we have .../MyFirstContribution.html#summary instead of
.../MyFirstContribution.html#_summary. In addition to being prettier,
the custom IDs also enable anchor linking to work with
asciidoc-generated pages. This change compiles with no warnings using
`asciidoctor -b html5 Documentation/MyFirstContribution.txt`.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

A trial run-through of the tutorial revealed a few typos and missing
commands in the tutorial itself. This commit fixes typos, clarifies
which lines to keep or modify in some places, and adds a section on
putting the git-psuh binary into the gitignore.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

We implement a command called git-psuh which accept arguments, so let's
show that it accepts arguments in the doc and the usage string.

While at it, we need to prepare "a NULL-terminated array of usage strings",
not just "a NULL-terminated usage string".

Helped-by: Emily Shaffer <emilyshaffer@google.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>