numberRegex fixed

[fukurou]

    def numberRegex(self, str2Check: str) -> str:
        theRegex = r"[-+]?[0-9]*[.,][0-9]*"
        list1: list[str] = []
        regexMatcher = re.search(theRegex, str2Check)
        if (regexMatcher != None):
            return regexMatcher.group(0).strip()
        return ""