Make test-bundle-type work on MacOS 10.4.11

head on MacOS Tiger doesn't have a -c option.

tests/test-bundle-type

@@ -1,41 +1,41
 #!/bin/sh
 
 echo % bundle w/o type option
 hg init t1
 hg init t2
 cd t1
 echo blablablablabla > file.txt
 hg ci -Ama
 hg log | grep summary
 hg bundle ../b1 ../t2
 
 cd ../t2
 hg pull ../b1
 hg up
 hg log | grep summary
 cd ..
 
 for t in "None" "bzip2" "gzip"; do
   echo % test bundle type $t
   hg init t$t
   cd t1
   hg bundle -t $t ../b$t ../t$t
-  head -c 6 ../b$t
+  head -n 1 ../b$t | cut -b 1-6
   cd ../t$t
   hg pull ../b$t
   hg up
   hg log | grep summary
   cd ..
 done
 
 echo % test garbage file
 echo garbage > bgarbage
 hg init tgarbage
 cd tgarbage
 hg pull ../bgarbage
 cd ..
 
 echo % test invalid bundle type
 cd t1
 hg bundle -a -t garbage ../bgarbage
 cd ..

tests/test-bundle-type.out

@@ -1,55 +1,58
 % bundle w/o type option
 adding file.txt
 summary:     a
 searching for changes
 1 changesets found
 pulling from ../b1
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 (run 'hg update' to get a working copy)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 summary:     a
 % test bundle type None
 searching for changes
 1 changesets found
-HG10UNpulling from ../bNone
+HG10UN
+pulling from ../bNone
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 (run 'hg update' to get a working copy)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 summary:     a
 % test bundle type bzip2
 searching for changes
 1 changesets found
-HG10BZpulling from ../bbzip2
+HG10BZ
+pulling from ../bbzip2
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 (run 'hg update' to get a working copy)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 summary:     a
 % test bundle type gzip
 searching for changes
 1 changesets found
-HG10GZpulling from ../bgzip
+HG10GZ
+pulling from ../bgzip
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 (run 'hg update' to get a working copy)
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 summary:     a
 % test garbage file
 abort: ../bgarbage: not a Mercurial bundle file
 % test invalid bundle type
 1 changesets found
 abort: unknown bundle type specified with --type