test-lib: Make the test_external_* functions TAP-aware

diff --git a/t/t7005-editor.sh b/t/t7005-editor.sh
index 5257f4d261c2060b881d2649034232f76f4ed9b7..fe60d699a3d6d00a734e9f0bbc502828c5244b7e 100755 (executable)
--- a/t/t7005-editor.sh
+++ b/t/t7005-editor.sh
@@ -13,7 +13,7 @@ test_expect_success 'determine default editor' '
 
 '
 
-if ! expr "$vi" : '^[a-z]*$' >/dev/null
+if ! expr "$vi" : '[a-z]*$' >/dev/null
 then
        vi=
 fi
@@ -38,7 +38,7 @@ test_expect_success setup '
        test_commit "$msg" &&
        echo "$msg" >expect &&
        git show -s --format=%s > actual &&
-       diff actual expect
+       test_cmp actual expect
 
 '
 
@@ -85,7 +85,7 @@ do
                git --exec-path=. commit --amend &&
                git show -s --pretty=oneline |
                sed -e "s/^[0-9a-f]* //" >actual &&
-               diff actual expect
+               test_cmp actual expect
        '
 done
 
@@ -107,7 +107,7 @@ do
                git --exec-path=. commit --amend &&
                git show -s --pretty=oneline |
                sed -e "s/^[0-9a-f]* //" >actual &&
-               diff actual expect
+               test_cmp actual expect
        '
 done