doc: use .adoc extension for AsciiDoc files

We presently use the ".txt" extension for our AsciiDoc files.  While not
wrong, most editors do not associate this extension with AsciiDoc,
meaning that contributors don't get automatic editor functionality that
could be useful, such as syntax highlighting and prose linting.

It is much more common to use the ".adoc" extension for AsciiDoc files,
since this helps editors automatically detect files and also allows
various forges to provide rich (HTML-like) rendering.  Let's do that
here, renaming all of the files and updating the includes where
relevant.  Adjust the various build scripts and makefiles to use the new
extension as well.

Note that this should not result in any user-visible changes to the
documentation.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

32 files changed, 5 insertions, 5 deletions

diff --git a/Documentation/technical/api-error-handling.txt b/Documentation/technical/api-error-handling.adoc
index 665c4960b4..665c4960b4 100644
--- a/Documentation/technical/api-error-handling.txt
+++ b/Documentation/technical/api-error-handling.adoc
diff --git a/Documentation/technical/api-index-skel.txt b/Documentation/technical/api-index-skel.adoc
index 7780a76b08..7780a76b08 100644
--- a/Documentation/technical/api-index-skel.txt
+++ b/Documentation/technical/api-index-skel.adoc
diff --git a/Documentation/technical/api-index.sh b/Documentation/technical/api-index.sh
index 2964885574..dd206b1ca4 100755
--- a/Documentation/technical/api-index.sh
+++ b/Documentation/technical/api-index.sh
@@ -13,18 +13,18 @@ OUTPUT="$2"
 	cd "$SOURCE_DIR"
 
 	c=////////////////////////////////////////////////////////////////
-	skel=api-index-skel.txt
+	skel=api-index-skel.adoc
 	sed -e '/^\/\/ table of contents begin/q' "$skel"
 	echo "$c"
 
-	ls api-*.txt |
+	ls api-*.adoc |
 	while read filename
 	do
 		case "$filename" in
-		api-index-skel.txt | api-index.txt) continue ;;
+		api-index-skel.adoc | api-index.adoc) continue ;;
 		esac
 		title=$(sed -e 1q "$filename")
-		html=${filename%.txt}.html
+		html=${filename%.adoc}.html
 		echo "* link:$html[$title]"
 	done
 	echo "$c"
diff --git a/Documentation/technical/api-merge.txt b/Documentation/technical/api-merge.adoc
index c2ba01828c..c2ba01828c 100644
--- a/Documentation/technical/api-merge.txt
+++ b/Documentation/technical/api-merge.adoc
diff --git a/Documentation/technical/api-parse-options.txt b/Documentation/technical/api-parse-options.adoc
index 61fa6ee167..61fa6ee167 100644
--- a/Documentation/technical/api-parse-options.txt
+++ b/Documentation/technical/api-parse-options.adoc
diff --git a/Documentation/technical/api-simple-ipc.txt b/Documentation/technical/api-simple-ipc.adoc
index c4fb152b23..c4fb152b23 100644
--- a/Documentation/technical/api-simple-ipc.txt
+++ b/Documentation/technical/api-simple-ipc.adoc
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.adoc
index 5817b18310..cf493dae03 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.adoc
@@ -140,7 +140,7 @@ $ cat ~/log.event
 To enable a target, set the corresponding environment variable or
 system or global config value to one of the following:
 
-include::../trace2-target-values.txt[]
+include::../trace2-target-values.adoc[]
 
 When trace files are written to a target directory, they will be named according
 to the last component of the SID (optionally followed by a counter to avoid
diff --git a/Documentation/technical/bitmap-format.txt b/Documentation/technical/bitmap-format.adoc
index bfb0ec7beb..bfb0ec7beb 100644
--- a/Documentation/technical/bitmap-format.txt
+++ b/Documentation/technical/bitmap-format.adoc
diff --git a/Documentation/technical/build-systems.txt b/Documentation/technical/build-systems.adoc
index d9dafb407c..d9dafb407c 100644
--- a/Documentation/technical/build-systems.txt
+++ b/Documentation/technical/build-systems.adoc
diff --git a/Documentation/technical/bundle-uri.txt b/Documentation/technical/bundle-uri.adoc
index 91d3a13e32..91d3a13e32 100644
--- a/Documentation/technical/bundle-uri.txt
+++ b/Documentation/technical/bundle-uri.adoc
diff --git a/Documentation/technical/commit-graph.txt b/Documentation/technical/commit-graph.adoc
index 2c26e95e51..2c26e95e51 100644
--- a/Documentation/technical/commit-graph.txt
+++ b/Documentation/technical/commit-graph.adoc
diff --git a/Documentation/technical/directory-rename-detection.txt b/Documentation/technical/directory-rename-detection.adoc
index 029ee2cedc..029ee2cedc 100644
--- a/Documentation/technical/directory-rename-detection.txt
+++ b/Documentation/technical/directory-rename-detection.adoc
diff --git a/Documentation/technical/hash-function-transition.txt b/Documentation/technical/hash-function-transition.adoc
index 7102c7c8f5..7102c7c8f5 100644
--- a/Documentation/technical/hash-function-transition.txt
+++ b/Documentation/technical/hash-function-transition.adoc
diff --git a/Documentation/technical/long-running-process-protocol.txt b/Documentation/technical/long-running-process-protocol.adoc
index 6f33654b42..6f33654b42 100644
--- a/Documentation/technical/long-running-process-protocol.txt
+++ b/Documentation/technical/long-running-process-protocol.adoc
diff --git a/Documentation/technical/multi-pack-index.txt b/Documentation/technical/multi-pack-index.adoc
index cc063b30be..cc063b30be 100644
--- a/Documentation/technical/multi-pack-index.txt
+++ b/Documentation/technical/multi-pack-index.adoc
diff --git a/Documentation/technical/pack-heuristics.txt b/Documentation/technical/pack-heuristics.adoc
index 95a07db6e8..95a07db6e8 100644
--- a/Documentation/technical/pack-heuristics.txt
+++ b/Documentation/technical/pack-heuristics.adoc
diff --git a/Documentation/technical/packfile-uri.txt b/Documentation/technical/packfile-uri.adoc
index 9d453d4765..9d453d4765 100644
--- a/Documentation/technical/packfile-uri.txt
+++ b/Documentation/technical/packfile-uri.adoc
diff --git a/Documentation/technical/parallel-checkout.txt b/Documentation/technical/parallel-checkout.adoc
index b4a144e5f4..b4a144e5f4 100644
--- a/Documentation/technical/parallel-checkout.txt
+++ b/Documentation/technical/parallel-checkout.adoc
diff --git a/Documentation/technical/partial-clone.txt b/Documentation/technical/partial-clone.adoc
index bf5ec5c82d..bf5ec5c82d 100644
--- a/Documentation/technical/partial-clone.txt
+++ b/Documentation/technical/partial-clone.adoc
diff --git a/Documentation/technical/platform-support.txt b/Documentation/technical/platform-support.adoc
index 0a2fb28d62..0a2fb28d62 100644
--- a/Documentation/technical/platform-support.txt
+++ b/Documentation/technical/platform-support.adoc
diff --git a/Documentation/technical/racy-git.txt b/Documentation/technical/racy-git.adoc
index 59bea66c0f..59bea66c0f 100644
--- a/Documentation/technical/racy-git.txt
+++ b/Documentation/technical/racy-git.adoc
diff --git a/Documentation/technical/reftable.txt b/Documentation/technical/reftable.adoc
index dd0b37c4e3..dd0b37c4e3 100644
--- a/Documentation/technical/reftable.txt
+++ b/Documentation/technical/reftable.adoc
diff --git a/Documentation/technical/remembering-renames.txt b/Documentation/technical/remembering-renames.adoc
index 73f41761e2..73f41761e2 100644
--- a/Documentation/technical/remembering-renames.txt
+++ b/Documentation/technical/remembering-renames.adoc
diff --git a/Documentation/technical/repository-version.txt b/Documentation/technical/repository-version.adoc
index b9bb81a81f..b9bb81a81f 100644
--- a/Documentation/technical/repository-version.txt
+++ b/Documentation/technical/repository-version.adoc
diff --git a/Documentation/technical/rerere.txt b/Documentation/technical/rerere.adoc
index 580f23360a..580f23360a 100644
--- a/Documentation/technical/rerere.txt
+++ b/Documentation/technical/rerere.adoc
diff --git a/Documentation/technical/scalar.txt b/Documentation/technical/scalar.adoc
index 921cb104c3..921cb104c3 100644
--- a/Documentation/technical/scalar.txt
+++ b/Documentation/technical/scalar.adoc
diff --git a/Documentation/technical/send-pack-pipeline.txt b/Documentation/technical/send-pack-pipeline.adoc
index 9b5a0bc186..9b5a0bc186 100644
--- a/Documentation/technical/send-pack-pipeline.txt
+++ b/Documentation/technical/send-pack-pipeline.adoc
diff --git a/Documentation/technical/shallow.txt b/Documentation/technical/shallow.adoc
index f3738baa0f..f3738baa0f 100644
--- a/Documentation/technical/shallow.txt
+++ b/Documentation/technical/shallow.adoc
diff --git a/Documentation/technical/sparse-checkout.txt b/Documentation/technical/sparse-checkout.adoc
index d968659354..d968659354 100644
--- a/Documentation/technical/sparse-checkout.txt
+++ b/Documentation/technical/sparse-checkout.adoc
diff --git a/Documentation/technical/sparse-index.txt b/Documentation/technical/sparse-index.adoc
index 3b24c1a219..3b24c1a219 100644
--- a/Documentation/technical/sparse-index.txt
+++ b/Documentation/technical/sparse-index.adoc
diff --git a/Documentation/technical/trivial-merge.txt b/Documentation/technical/trivial-merge.adoc
index 1f1c33d0da..1f1c33d0da 100644
--- a/Documentation/technical/trivial-merge.txt
+++ b/Documentation/technical/trivial-merge.adoc
diff --git a/Documentation/technical/unit-tests.txt b/Documentation/technical/unit-tests.adoc
index 5a432b7b29..5a432b7b29 100644
--- a/Documentation/technical/unit-tests.txt
+++ b/Documentation/technical/unit-tests.adoc