groff: Input Conventions
5.1.6 Input Conventions
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Since 'gtroff' does filling automatically, it is traditional in 'groff'
not to try and type things in as nicely formatted paragraphs. These are
some conventions commonly used when typing 'gtroff' text:
* Break lines after punctuation, particularly at the end of a
sentence and in other logical places. Keep separate phrases on
lines by themselves, as entire phrases are often added or deleted
when editing.
* Try to keep lines less than 40-60 characters, to allow space for
inserting more text.
* Do not try to do any formatting in a WYSIWYG manner (i.e., don't
try using spaces to get proper indentation).