Ruby Errno：文件名字符串是从gsub返回时的ENOENT

I'm encountering an issue with a ruby script called from CLI (not in a framework) that results in a ENOENT error (File does not exist) when attempting to open it, but only when the filename has been constructed using gsub regular expression replacement. It works when the string is constructed by any other method. I'm sure it's something simple that I've done wrong, but I've had a heck of a time figuring it out.I'm encountering an issue with a ruby script ca