git-shortlog, like git-log, supports options to filter what commits are
used to generate the log. These options come from git-rev-list, and are
documented in Documentation/rev-list-options.txt. Include those options
in shortlog's documentation.

But since rev-list-options.txt contains some other options that don't
really apply in the context of shortlog (like diff formatting, commit
ordering, etc), add a switch in rev-list-options.txt that excludes those
sections from the shortlog documentation. To be more specific, include
only the "Commit Limiting" section.

Signed-off-by: Pratyush Yadav <redacted>
---
That ifdef covers almost the entire document. Is there a better way in
Asciidoc to do something like this?

 Documentation/git-shortlog.txt     | 3 +++
 Documentation/rev-list-options.txt | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt
index bc80905a8a..a72ea7f7ba 100644
--- a/Documentation/git-shortlog.txt
+++ b/Documentation/git-shortlog.txt

@@ -76,6 +76,9 @@ them.
 Paths may need to be prefixed with `--` to separate them from
 options or the revision range, when confusion arises.

+:git-shortlog: 1
+include::rev-list-options.txt[]
+
 MAPPING AUTHORS
 ---------------

diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 90ff9e2bea..f4b67a917d 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt

@@ -314,6 +314,7 @@ ifdef::git-rev-list[]
 	`<header>` text will be printed with each progress update.
 endif::git-rev-list[]

+ifndef::git-shortlog[]
 History Simplification
 ~~~~~~~~~~~~~~~~~~~~~~

@@ -1016,3 +1017,4 @@ options may be given. See linkgit:git-diff-files[1] for more options.
 -t::
 	Show the tree objects in the diff output. This implies `-r`.
 endif::git-rev-list[]
+endif::git-shortlog[]
--

2.21.0