t1300-repo-config.sh failed on CYGWIN

If I run it on CYGWIN, there's an error msg:

* FAIL 39: rename section

        git-repo-config --rename-section branch.eins branch.zwei

* FAIL 40: rename succeeded
diff -u expect .git/config
...

I run some commands...

$ cd t/trash
$ rm -f .git/config.lock
$ ../../git-repo-config.exe --rename-section branch.eins branch.zwei
error: Cannot commit config file!

Thanks,
namsh

With a patch below, the problem gone.

BTW, there's a leak for 'config_filename' in
git_config_rename_section().

Thanks,
namsh

index 663993f..a23ac47 100644
@@ -806,6 +806,7 @@ int git_config_rename_section(const char *old_name,

const char *new_name)
}
write(out_fd, buf, strlen(buf));
}
+ fclose(config_file);
if (close(out_fd) || commit_lock_file(lock) < 0)
return error("Cannot commit config file!");
return ret;