[RFC PATCHv3 1/4] am: avoid re-directing stdin twice

[Chris Packham <judge.packham@gmail.com>]

In check_patch_format we feed $1 to a block that attempts to determine
the patch format. Since we've already redirected $1 to stdin there is no
need to redirect it again when we invoke tr. This prevents the following
errors when invoking git am

  $ git am patch.patch
  tr: write error: Broken pipe
  tr: write error
  Patch format detection failed.

Cc: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
---
Nothing new since http://article.gmane.org/gmane.comp.version-control.git/256425

 git-am.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/git-am.sh b/git-am.sh
index ee61a77..fade7f8 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -250,7 +250,7 @@ check_patch_format () {
 			# discarding the indented remainder of folded lines,
 			# and see if it looks like that they all begin with the
 			# header field names...
-			tr -d '\015' <"$1" |
+			tr -d '\015' |
 			sed -n -e '/^$/q' -e '/^[ 	]/d' -e p |
 			sane_egrep -v '^[!-9;-~]+:' >/dev/null ||
 			patch_format=mbox
-- 
2.1.0.64.gc343089