Merge branch 'robustify-is-hidden-tests'

In Git for Windows, there is an option to mark the .git directory as
hidden. Our test cases verify this by using the system utility
`attrib.exe`.

This file name is unfortunately quite generic, and overlaps with a
Unix-y utility that might be hiding the system one in the `PATH`.

Let's specify explicitly which `attrib` to use.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

t/t0001-init.sh

@@ -413,7 +413,7 @@ test_expect_success SYMLINKS 're-init to move gitdir symlink' '
 # Tests for the hidden file attribute on windows
 is_hidden () {
 	# Use the output of `attrib`, ignore the absolute path
-	case "$(attrib "$1")" in *H*?:*) return 0;; esac
+	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
 	return 1
 }
 

t/t5611-clone-config.sh

@@ -95,7 +95,7 @@ test_expect_success 'clone -c remote.<remote>.fetch=<refspec> --origin=<name>' '
 # Tests for the hidden file attribute on windows
 is_hidden () {
 	# Use the output of `attrib`, ignore the absolute path
-	case "$(attrib "$1")" in *H*?:*) return 0;; esac
+	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
 	return 1
 }