format-patch: respect --stat in cover letter's diffstat

diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index d826e24b45118d4b87a2723f540c742ac6300f44..be5c1bd553ede55d54e1d918625c99000ba32d80 100755 (executable)
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -217,9 +217,8 @@ do
        '
 
        test_expect_success "grep -w $L (w)" '
-               : >expected &&
                test_must_fail git grep -n -w -e "^w" $H >actual &&
-               test_cmp expected actual
+               test_must_be_empty actual
        '
 
        test_expect_success "grep -w $L (x)" '
@@ -239,26 +238,24 @@ do
        '
 
        test_expect_success "grep -w $L (y-2)" '
-               : >expected &&
                if git grep -n -w -e "^y y" $H >actual
                then
                        echo should not have matched
                        cat actual
                        false
                else
-                       test_cmp expected actual
+                       test_must_be_empty actual
                fi
        '
 
        test_expect_success "grep -w $L (z)" '
-               : >expected &&
                if git grep -n -w -e "^z" $H >actual
                then
                        echo should not have matched
                        cat actual
                        false
                else
-                       test_cmp expected actual
+                       test_must_be_empty actual
                fi
        '
 
@@ -498,7 +495,7 @@ test_expect_success 'grep -L -C' '
 
 test_expect_success 'grep --files-without-match --quiet' '
        git grep --files-without-match --quiet nonexistent_string >actual &&
-       test_cmp /dev/null actual
+       test_must_be_empty actual
 '
 
 cat >expected <<EOF
@@ -619,11 +616,10 @@ z:zzz
 EOF
 
 test_expect_success 'grep -q, silently report matches' '
-       >empty &&
        git grep -q mmap >actual &&
-       test_cmp empty actual &&
+       test_must_be_empty actual &&
        test_must_fail git grep -q qfwfq >actual &&
-       test_cmp empty actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'grep -C1 hunk mark between files' '
@@ -716,8 +712,7 @@ test_expect_success 'log grep (9)' '
 
 test_expect_success 'log grep (9)' '
        git log -g --grep-reflog="commit: third" --author="non-existent" --pretty=tformat:%s >actual &&
-       : >expect &&
-       test_cmp expect actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'log --grep-reflog can only be used under -g' '
@@ -807,15 +802,13 @@ test_expect_success 'log --all-match --grep --grep --author takes intersection'
 '
 
 test_expect_success 'log --author does not search in timestamp' '
-       : >expect &&
        git log --author="$GIT_AUTHOR_DATE" >actual &&
-       test_cmp expect actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'log --committer does not search in timestamp' '
-       : >expect &&
        git log --committer="$GIT_COMMITTER_DATE" >actual &&
-       test_cmp expect actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'grep with CE_VALID file' '
@@ -956,7 +949,7 @@ test_expect_success 'grep from a subdirectory to search wider area (2)' '
        (
                cd s &&
                test_expect_code 1 git grep xxyyzz .. >out &&
-               ! test -s out
+               test_must_be_empty out
        )
 '
 
@@ -1065,13 +1058,12 @@ test_expect_success 'inside git repository but with --no-index' '
                echo ".gitignore:.*o*" &&
                cat is/expect.unignored
        } >is/expect.full &&
-       : >is/expect.empty &&
        echo file2:world >is/expect.sub &&
        (
                cd is/git &&
                git init &&
                test_must_fail git grep o >../actual.full &&
-               test_cmp ../expect.empty ../actual.full &&
+               test_must_be_empty ../actual.full &&
 
                git grep --untracked o >../actual.unignored &&
                test_cmp ../expect.unignored ../actual.unignored &&
@@ -1084,7 +1076,7 @@ test_expect_success 'inside git repository but with --no-index' '
 
                cd sub &&
                test_must_fail git grep o >../../actual.sub &&
-               test_cmp ../../expect.empty ../../actual.sub &&
+               test_must_be_empty ../../actual.sub &&
 
                git grep --no-index o >../../actual.sub &&
                test_cmp ../../expect.sub ../../actual.sub &&
@@ -1250,10 +1242,9 @@ test_expect_success !PCRE 'grep -P pattern errors without PCRE' '
 '
 
 test_expect_success 'grep pattern with grep.extendedRegexp=true' '
-       >empty &&
        test_must_fail git -c grep.extendedregexp=true \
                grep "\p{Ps}.*?\p{Pe}" hello.c >actual &&
-       test_cmp empty actual
+       test_must_be_empty actual
 '
 
 test_expect_success PCRE 'grep -P pattern with grep.extendedRegexp=true' '