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Here I use a negative number to decide whether the count has been explicitly set. I think it unlikely that negative sections will ever be created given that negative numbers complicate argument handling: ``` $ man -1 foo man: invalid option -- '1' ``` and given that there's already precedence for alphanumeric sections like `3p`, `3x`, `n`, etc. --- This does work, though: ``` $ man -S -3 baz ``` With `man baz.-3` and `man 'baz(-3)'`, (GNU) man *might* consider `-3` internally as a section, but in the end reports as if the whole argument was the name of a topic: ``` $ man 'baz(-3)' No manual entry for baz(-3) ``` --- Closes #13411.