[PATCH] doc: fix the stale link to api-builtin.txt

["Kazuo Yagi via GitGitGadget" <gitgitgadget@gmail.com>]

From: Kazuo Yagi <kazuo.yagi@gmail.com>

ec14d4e had moved documentation from api-builtin.txt to builtin.h.
This patch updates new-command.txt to reflect that change.

Signed-off-by: Kazuo Yagi <kazuo.yagi@gmail.com>
---
    Fixed unavailable link in Documentation/howto/new-command.txt along…
    
    … with the changeset history.
    
    Signed-off-by: Kazuo Yagi kazuo.yagi@gmail.com [kazuo.yagi@gmail.com]

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-647%2Fkyagi%2Ffix-unavailable-link-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-647/kyagi/fix-unavailable-link-v1
Pull-Request: https://github.com/git/git/pull/647

 Documentation/howto/new-command.txt |  6 +++---
 builtin.h                           | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/Documentation/howto/new-command.txt b/Documentation/howto/new-command.txt
index 15a4c8031f1..ac73c98be72 100644
--- a/Documentation/howto/new-command.txt
+++ b/Documentation/howto/new-command.txt
@@ -1,13 +1,13 @@
 From: Eric S. Raymond <esr@thyrsus.com>
 Abstract: This is how-to documentation for people who want to add extension
- commands to Git.  It should be read alongside api-builtin.txt.
+ commands to Git.  It should be read alongside builtin.h.
 Content-type: text/asciidoc
 
 How to integrate new subcommands
 ================================
 
 This is how-to documentation for people who want to add extension
-commands to Git.  It should be read alongside api-builtin.txt.
+commands to Git.  It should be read alongside builtin.h.
 
 Runtime environment
 -------------------
@@ -48,7 +48,7 @@ binary); this organization makes it easy for people reading the code
 to find things.
 
 See the CodingGuidelines document for other guidance on what we consider
-good practice in C and shell, and api-builtin.txt for the support
+good practice in C and shell, and builtin.h for the support
 functions available to built-in commands written in C.
 
 What every extension command needs
diff --git a/builtin.h b/builtin.h
index 5cf5df69f72..101ef8edc4d 100644
--- a/builtin.h
+++ b/builtin.h
@@ -92,6 +92,31 @@
  *
  * The return value from `cmd_foo()` becomes the exit status of the
  * command.
+ *
+ * Changeset History
+ * -----------------
+ *
+ * The following describes how the documentation has finally been placed
+ * in this file, over the related changesets.
+ *
+ * +-----------------+ *OLD LINK*  +-----------------+
+ * | api-builtin.txt | <~~~~~~~~~~ | api-command.txt |
+ * +-----------------+             +-----------------+
+ *    |                               ~  *  |
+ *    | deleted,                     ~  N   | moved and renamed from
+ *    | contents is taken over      ~  E    | Documentation/technical/
+ *    | by builtin.h               ~  W     | to
+ *    | (this file)               ~         | Documentation/howto/
+ *    |                          ~ L        |
+ *    |                         ~ I         |
+ *    v                        ~ N          v
+ * +-----------+              ~ K  +-----------------+
+ * | builtin.h | <~~~~~~~~~~~~ *   | new-command.txt |
+ * +-----------+                   +-----------------+
+ *
+ * ---> moved to(or renamed to)
+ * ~~~> refers to
+ *
  */
 
 #define DEFAULT_MERGE_LOG_LEN 20

base-commit: 3cb8921f74354a3a4aeaa932869acb7e6aabe630
-- 
gitgitgadget