git-receive-pack.txt: wrap shell [script] listing in "----"

The indented lines in the example shell script listing are indented
differently by AsciiDoc and Asciidoctor.

Fix this by marking the example shell script as a code listing by
wrapping it in "----".  Because this gives us some extra indentation, we
can remove the one that we have been carrying explicitly. That is, drop
the first tab of indentation on each line. For consistency, make the
same change to the short example shell session further down.

With AsciiDoc, this results in identical rendering before and after this
commit. Asciidoctor now renders this the same as AsciiDoc does.

Signed-off-by: Martin Ågren <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: Martin Ågren

Documentation/git-receive-pack.txt

@@ -165,29 +165,31 @@ ref listing the commits pushed to the repository, and logs the push
 certificates of signed pushes with good signatures to a logger
 service:
 
-	#!/bin/sh
-	# mail out commit update information.
-	while read oval nval ref
-	do
-		if expr "$oval" : '0*$' >/dev/null
-		then
-			echo "Created a new ref, with the following commits:"
-			git rev-list --pretty "$nval"
-		else
-			echo "New commits:"
-			git rev-list --pretty "$nval" "^$oval"
-		fi |
-		mail -s "Changes to ref $ref" commit-list@mydomain
-	done
-	# log signed push certificate, if any
-	if test -n "${GIT_PUSH_CERT-}" && test ${GIT_PUSH_CERT_STATUS} = G
+----
+#!/bin/sh
+# mail out commit update information.
+while read oval nval ref
+do
+	if expr "$oval" : '0*$' >/dev/null
 	then
-		(
-			echo expected nonce is ${GIT_PUSH_NONCE}
-			git cat-file blob ${GIT_PUSH_CERT}
-		) | mail -s "push certificate from $GIT_PUSH_CERT_SIGNER" push-log@mydomain
-	fi
-	exit 0
+		echo "Created a new ref, with the following commits:"
+		git rev-list --pretty "$nval"
+	else
+		echo "New commits:"
+		git rev-list --pretty "$nval" "^$oval"
+	fi |
+	mail -s "Changes to ref $ref" commit-list@mydomain
+done
+# log signed push certificate, if any
+if test -n "${GIT_PUSH_CERT-}" && test ${GIT_PUSH_CERT_STATUS} = G
+then
+	(
+		echo expected nonce is ${GIT_PUSH_NONCE}
+		git cat-file blob ${GIT_PUSH_CERT}
+	) | mail -s "push certificate from $GIT_PUSH_CERT_SIGNER" push-log@mydomain
+fi
+exit 0
+----
 
 The exit code from this hook invocation is ignored, however a
 non-zero exit code will generate an error message.
@@ -212,8 +214,10 @@ anyway.
 This hook can be used, for example, to run `git update-server-info`
 if the repository is packed and is served via a dumb transport.
 
-	#!/bin/sh
-	exec git update-server-info
+----
+#!/bin/sh
+exec git update-server-info
+----
 
 
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