Skip t1300.70 and 71 on msysGit.

These two tests fail on msysGit because /dev/null is an alias for nul on
Windows and when reading the value back from git config the alias does
not match the real filename. Also the HOME environment variable has a
unix-style path but git returns a native equivalent path for '~'.  As
these are platform-dependent equivalent results it seems simplest to
skip the test entirely.

Signed-off-by: Pat Thoyts <patthoyts <at> users.sourceforge.net>

t/t1300-repo-config.sh

@@ -701,13 +701,13 @@ cat >expect <<\EOF
 	trailingtilde = foo~
 EOF
 
-test_expect_success 'set --path' '
+test_expect_success NONMINGW 'set --path' '
 	git config --path path.home "~/" &&
 	git config --path path.normal "/dev/null" &&
 	git config --path path.trailingtilde "foo~" &&
 	test_cmp expect .git/config'
 
-if test "${HOME+set}"
+if test_have_prereq NONMINGW && test "${HOME+set}"
 then
 	test_set_prereq HOMEVAR
 fi
@@ -730,7 +730,7 @@ cat >expect <<\EOF
 foo~
 EOF
 
-test_expect_success 'get --path copes with unset $HOME' '
+test_expect_success NONMINGW 'get --path copes with unset $HOME' '
 	(
 		unset HOME;
 		test_must_fail git config --get --path path.home \

t/test-lib.sh

@@ -877,6 +877,7 @@ case $(uname -s) in
 	test_set_prereq POSIXPERM
 	test_set_prereq BSLASHPSPEC
 	test_set_prereq EXECKEEPSPID
+	test_set_prereq NONMINGW
 	;;
 esac