Merge branch 'jc/diff-test-updates' into maint

Test clean-up.

* jc/diff-test-updates:
  test_ln_s_add: refresh stat info of fake symbolic links
  t4008: modernise style
  t/diff-lib: check exact object names in compare_diff_raw
  tests: do not borrow from COPYING and README from the real source
  t4010: correct expected object names
  t9300: correct expected object names
  t4008: correct stale comments

t/test-lib-functions.sh

@@ -745,7 +745,9 @@ test_ln_s_add () {
 	else
 		printf '%s' "$1" >"$2" &&
 		ln_s_obj=$(git hash-object -w "$2") &&
-		git update-index --add --cacheinfo 120000 $ln_s_obj "$2"
+		git update-index --add --cacheinfo 120000 $ln_s_obj "$2" &&
+		# pick up stat info from the file
+		git update-index "$2"
 	fi
 }