am: don't call mailinfo if $rebasing

diff --git a/t/t4008-diff-break-rewrite.sh b/t/t4008-diff-break-rewrite.sh
index d79d9e1e71ec38b4a82f1bf36dbbff5c3247a4d4..73b4a24f5ef676b8fa9fb3dc83183437710853c3 100755 (executable)
--- a/t/t4008-diff-break-rewrite.sh
+++ b/t/t4008-diff-break-rewrite.sh
@@ -173,8 +173,8 @@ test_expect_success \
     'compare_diff_raw expected current'
 
 test_expect_success \
-    'run diff with -B -M' \
-    'git diff-index -B -M "$tree" >current'
+    'run diff with -B -C' \
+    'git diff-index -B -C "$tree" >current'
 
 cat >expected <<\EOF
 :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c C095  file0   file1