Historically English-language typography, in contrast to French typography, used a larger space between sentences than between words. Typists imitated this tra

Historically English-language typography, in contrast to French typography, used a larger space between sentences than between words. Typists imitated this traditional style. The single-space style gained typograhic ground through the twentieth century, becoming the norm in the 1950s. Preferring a single space between sentences is a reasonable choice. But flagging or "correcting" the two-space style is simply a mistake.