[PATCH] format-patch: fix skipping of blank-lines

[Junio C Hamano <junkio@cox.net>]

If it is fed a commit with more than one leading blank lines,
the sed scripts git-format-patch-script used looped forever.
This patch fixes it.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---

 git-format-patch-script |   18 +++++++++++++-----
 1 files changed, 13 insertions(+), 5 deletions(-)

58a3c79b488a28897cd5556dab0dd599b4ed9f0c
diff --git a/git-format-patch-script b/git-format-patch-script
--- a/git-format-patch-script
+++ b/git-format-patch-script
@@ -66,9 +66,13 @@ trap 'rm -f $tmp-*' 0 1 2 3 15
 series=$tmp-series
 
 titleScript='
-	1,/^$/d
+	/./d
 	: loop
-	/^$/b loop
+	/^$/{
+		n
+		b loop
+	}
+	s/^\[PATCH[^]]*\] *//
 	s/[^-a-z.A-Z_0-9]/-/g
         s/\.\.\.*/\./g
 	s/\.*$//
@@ -76,6 +80,7 @@ titleScript='
 	s/^-//
 	s/-$//
 	s/$/./
+	p
 	q
 '
 
@@ -88,7 +93,7 @@ total=`wc -l <$series`
 i=$total
 while read commit
 do
-    title=`git-cat-file commit "$commit" | sed -e "$titleScript"`
+    title=`git-cat-file commit "$commit" | sed -ne "$titleScript"`
     case "$numbered" in
     '') num= ;;
     *)
@@ -102,9 +107,12 @@ do
     echo "$file"
     {
 	mailScript='
-	1,/^$/d
+	/./d
 	: loop
-	/^$/b loop
+	/^$/{
+		n
+		b loop
+	}
 	s|^|[PATCH'"$num"'] |
 	: body
 	p