Can not edit/delete a file when its name starts with spaces

[wxiaoguang]

1. There are two cleanUploadFileName functions
2. The spaces in filenames are trimmed
3. If a file name starts with space eg: decode(%20a.txt), then it can not be edited/deleted from the web UI

@zeripath do you have any idea about why the spaces are trimmed? this change was introduced by #5702

gitea/routers/web/repo/editor.go

Lines 733 to 743 in ff2fd08

	func cleanUploadFileName(name string) string {
	// Rebase the filename
	name = strings.Trim(path.Clean("/"+name), " /")
	// Git disallows any filenames to have a .git directory in them.
	for _, part := range strings.Split(name, "/") {
	if strings.ToLower(part) == ".git" {
	return ""
	}
	}
	return name
	}

gitea/services/repository/files/file.go

Lines 129 to 140 in 719bddc

	// CleanUploadFileName Trims a filename and returns empty string if it is a .git directory
	func CleanUploadFileName(name string) string {
	// Rebase the filename
	name = strings.Trim(path.Clean("/"+name), " /")
	// Git disallows any filenames to have a .git directory in them.
	for _, part := range strings.Split(name, "/") {
	if strings.ToLower(part) == ".git" {
	return ""
	}
	}
	return name
	}

[zeripath]

I think the trim can safely be dropped