tests: export patches only once in test-impexp-branch

tests/test-impexp-branch.t

@@ -1,50 +1,56
   $ cat >findbranch.py <<EOF
   > import re, sys
   > 
   > head_re = re.compile('^#(?:(?:\\s+([A-Za-z][A-Za-z0-9_]*)(?:\\s.*)?)|(?:\\s*))$')
   > 
   > for line in sys.stdin:
   >     hmatch = head_re.match(line)
   >     if not hmatch:
   >         sys.exit(1)
   >     if hmatch.group(1) == 'Branch':
   >         sys.exit(0)
   > sys.exit(1)
   > EOF
+
   $ hg init a
   $ cd a
   $ echo "Rev 1" >rev
   $ hg add rev
   $ hg commit -m "No branch."
   $ hg branch abranch
   marked working directory as branch abranch
   $ echo "Rev  2" >rev
   $ hg commit -m "With branch."
-  $ if hg export 0 | python ../findbranch.py; then
+
+  $ hg export 0 > ../r0.patch
+  $ hg export 1 > ../r1.patch
+  $ cd ..
+
+  $ if python findbranch.py < r0.patch; then
   >     echo "Export of default branch revision has Branch header" 1>&2
   >     exit 1
   > fi
-  $ if hg export 1 | python ../findbranch.py; then
+
+  $ if python findbranch.py < r1.patch; then
   >     :  # Do nothing
   > else
   >     echo "Export of branch revision is missing Branch header" 1>&2
   >     exit 1
   > fi
 
 Make sure import still works with branch information in patches.
 
-  $ cd ..
   $ hg init b
   $ cd b
-  $ hg -R ../a export 0 | hg import -
-  applying patch from stdin
-  $ hg -R ../a export 1 | hg import -
-  applying patch from stdin
+  $ hg import ../r0.patch
+  applying ../r0.patch
+  $ hg import ../r1.patch
+  applying ../r1.patch
   $ cd ..
-  $ rm -rf b
-  $ hg init b
-  $ cd b
-  $ hg -R ../a export 0 | hg import --exact -
-  applying patch from stdin
-  $ hg -R ../a export 1 | hg import --exact -
-  applying patch from stdin
+
+  $ hg init c
+  $ cd c
+  $ hg import --exact ../r0.patch
+  applying ../r0.patch
+  $ hg import --exact ../r1.patch
+  applying ../r1.patch