Good to know! I am reminded of using *roff in the 1980s. Punctuation such as periods at the end of lines marked end of sentences, and nroff would insert two s

Good to know! I am reminded of using *roff in the 1980s. Punctuation such as periods at the end of lines marked end of sentences, and nroff would insert two spaces in that case. In HN, you can force two spaces between sentences. But only in code blocks.