hooks--update: fix test for properly set up project description file

The update hook template intends to abort if the project description file
hasn't been adjusted or is empty.  This patch fixes the check for 'being
adjusted'.
Signed-off-by: NGerrit Pape <pape@smarden.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

templates/hooks--update

@@ -34,8 +34,8 @@ fi
 allowunannotated=$(git-repo-config --bool hooks.allowunannotated)
 
 # check for no description
-projectdesc=$(sed -e '1p' "$GIT_DIR/description")
-if [ -z "$projectdesc" -o "$projectdesc" = "Unnamed repository; edit this file to name it for gitweb" ]; then
+projectdesc=$(sed -e '1q' "$GIT_DIR/description")
+if [ -z "$projectdesc" -o "$projectdesc" = "Unnamed repository; edit this file to name it for gitweb." ]; then
 	echo "*** Project description file hasn't been set" >&2
 	exit 1
 fi