For example:

In the original publication, the last sentence of the Introduction is: “I love dogs.”. This sentence should be replaced by: “I love cats.”.

  • In typical American English usage, it would be correct to write "I love cats." British usage rules would prefer ending your sentence with "I love cats". The original punctuation does not come into play unless it is noteworthy, as a question mark or exclamation point would be. Periods are not noteworthy punctuation.
    – RobJarvis
    Commented May 28, 2020 at 15:56
  • 2
    @RobJarvis No, that's a misconception. UK style is conditional, not absolute. Since the sentence ends with a period, UK style says to put the period inside the final quotation mark. You can refer to page 16 of the University of Oxford Style Guide (PDF) for complete guidance: "Place any punctuation which does not belong to the quote outside the quotation marks (except closing punctuation if the end of the quote is also the end of the sentence)." Commented May 28, 2020 at 16:01
  • This is a matter of style, and of anachronism. 60 or so years ago you'd have ."., but the "rules" changed to eliminate one of the dots. Which one is eliminated depends on several factors.
    – Hot Licks
    Commented May 28, 2020 at 21:09
  • Thank you, @JasonBassford, I now remember learning something about the conditional rules in UK punctuation long ago. I stand corrected.
    – RobJarvis
    Commented Jun 2, 2020 at 14:52