@@ -691,9 +691,9 @@ header when requesting a document from a URL:
691691 system default, use
692692 `pandoc --print-default-data-file=abbreviations`. The only
693693 use pandoc makes of this list is in the Markdown reader.
694− Strings ending in a period that are found in this list will
695− be followed by a nonbreaking space, so that the period will
696− not produce sentence-ending space in formats like LaTeX.
694+ Strings found in this list will be followed by a nonbreaking
695+ space, and the period will not produce sentence-ending space
696+ in formats like LaTeX. The strings may not contain spaces.
697697
698698[`pandocfilters`]: https://github.com/jgm/pandocfilters
699699[PHP]: https://github.com/vinai/pandocfilters-php