color: fix test-diff-color breakage

tests/test-diff-color.out

@@ -1,63 +1,63
 adding a
 % default context
 diff -r cf9f4ba66af2 a
 --- a/a
 +++ b/a
 @@ -2,7 +2,7 @@
  c
  a
  a
 -b
 +dd
  a
  a
  c
 % --unified=2
 diff -r cf9f4ba66af2 a
 --- a/a
 +++ b/a
 @@ -3,5 +3,5 @@
  a
  a
 -b
 +dd
  a
  a
 % diffstat
  a |  2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)
 % record
 diff --git a/a b/a
 old mode 100644
 new mode 100755
-1 hunks, 2 lines changed
+1 hunks, 1 lines changed
 examine changes to 'a'? [Ynsfdaq?] 
 @@ -2,7 +2,7 @@
  c
  a
  a
 -b
 +dd
  a
  a
  c
 record this change to 'a'? [Ynsfdaq?] 
 
 rolling back to revision 0 (undo commit)
 % qrecord
 diff --git a/a b/a
 old mode 100644
 new mode 100755
-1 hunks, 2 lines changed
+1 hunks, 1 lines changed
 examine changes to 'a'? [Ynsfdaq?] 
 @@ -2,7 +2,7 @@
  c
  a
  a
 -b
 +dd
  a
  a
  c
 record this change to 'a'? [Ynsfdaq?]