maint: check return of split_cmdline to avoid bad config strings

diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index 4e7d68dda28a54cdc4f46e11717e113fa8dd479c..9337b81064bbdbe4e7f590830b458c48226c4a17 100755 (executable)
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -112,7 +112,7 @@ do
                } >"$actual" &&
                if test -f "$expect"
                then
-                       git diff "$expect" "$actual" &&
+                       test_cmp "$expect" "$actual" &&
                        rm -f "$actual"
                else
                        # this is to help developing new tests.
@@ -243,6 +243,9 @@ format-patch --inline --stdout initial..side
 format-patch --inline --stdout initial..master^
 format-patch --inline --stdout initial..master
 format-patch --inline --stdout --subject-prefix=TESTCASE initial..master
+config format.subjectprefix DIFFERENT_PREFIX
+format-patch --inline --stdout initial..master^^
+format-patch --stdout --cover-letter -n initial..master^
 
 diff --abbrev initial..side
 diff -r initial..side
@@ -254,6 +257,7 @@ diff --patch-with-raw initial..side
 diff --patch-with-stat -r initial..side
 diff --patch-with-raw -r initial..side
 diff --name-status dir2 dir
+diff --no-index --name-status dir2 dir
 EOF
 
 test_done