Thread:Spencerz/@comment-1895174-20130126231325/@comment-1895174-20130126233003

From Chicago:
 * The view at CMOS is that there is no reason for two spaces after a period in published work. Some people, however—my colleagues included—prefer it, relegating this preference to their personal correspondence and notes.

From MLA:
 * As a practical matter, however, there is nothing wrong with using two spaces after concluding punctuation marks