• NateNate60@lemmy.worldOP
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        5 days ago

        They said—

        A line with exactly 0 or 1 characters, or a line with a sequence of 1 or 3 or more characters, repeated at least twice

        Note—

        …or a line with a sequence of 1 or 3 or more characters, repeated at least twice

        It should be—

        …or a line with a sequence of 2 or more characters, repeated at least twice

        The regex in the post will match “abab”. Their original description (line 2 of this comment) will not match “abab”.