doc: update howto-index.sh for .adoc extensions

The .txt extensions were changed to .adoc in 1f010d6bdf (doc: use .adoc
extension for AsciiDoc files, 2025-01-20).  This left broken links in
the generated howto-index.html.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/howto/howto-index.sh b/Documentation/howto/howto-index.sh
index eecd123a93607998e8b4eb8511f4165973f9d93e..ace49830a8234fe055898d7b9c156a7524e3a93e 100755 (executable)
--- a/Documentation/howto/howto-index.sh
+++ b/Documentation/howto/howto-index.sh
@@ -9,9 +9,9 @@ people describing how they use Git in their workflow.
 
 EOF
 
-for txt
+for adoc
 do
-       title=$(expr "$txt" : '.*/\(.*\)\.txt$')
+       title=$(expr "$adoc" : '.*/\(.*\)\.adoc$')
        from=$(sed -ne '
        /^$/q
        /^From:[        ]/{
@@ -21,7 +21,7 @@ do
                s/^/by /
                p
        }
-       ' "$txt")
+       ' "$adoc")
 
        abstract=$(sed -ne '
        /^Abstract:[    ]/{
@@ -39,13 +39,13 @@ do
                x
                p
                q
-       }' "$txt")
+       }' "$adoc")
 
-       if grep 'Content-type: text/asciidoc' >/dev/null $txt
+       if grep 'Content-type: text/asciidoc' >/dev/null $adoc
        then
-               file=$(expr "$txt" : '\(.*\)\.txt$').html
+               file=$(expr "$adoc" : '\(.*\)\.adoc$').html
        else
-               file="$txt"
+               file="$adoc"
        fi
 
        echo "* link:howto/$(basename "$file")[$title] $from