14.3.1 Not Ending a Sentence

Depending on whether a period or exclamation point or question mark is inside or at the end of a sentence, less or more space is inserted after a period in a typeset manual. Since it is not always possible to determine when a period ends a sentence and when it is used in an abbreviation, special commands are needed in some circumstances. Usually, Texinfo can guess how to handle periods, so you do not need to use the special commands; you just enter a period as you would if you were using a typewriter, which means you put two spaces after the period, question mark, or exclamation mark that ends a sentence.

Use the @: command after a period, question mark, exclamation mark, or colon that should not be followed by extra space. For example, use @: after periods that end abbreviations which are not at the ends of sentences.

For example,

foo vs.@: bar
foo vs. bar

produces

foo vs. bar
foo vs. bar

@: has no effect on the Info and HTML output. In Docbook and XML, the previous punctuation character (.?!:) is output as an entity instead of as the normal character: ‘. ? ! :’. This gives further processors a chance to notice and not add the usual extra space.

Do not put braces after @: (or any non-alphabetic command).