I have a question about the five line rule. Does that include blank lines?
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Is this example of a sig ok? I am writing a load of blah to illustrate what I mean.

Here is the second line of text. It says something different from the first line.

The third line now and each line is separated by a blank line thus.

Fourth line . . . are you getting frustrated by it yet? I know I would be.

Fifth line and you'd be right in thinking that a whole post can take up less space