Let's say I need to cite a website or printed report with the title:
Broccoli production in Ruritania, 1990-2010
with a hyphen in "1990-2010." In English typography, though, the standard indicator for numerical ranges is an en-dash (–), not the shorter hyphen (-).
Is it licit to substitute an en-dash for a hyphen in a citation or footnote, as in
See "Broccoli production in Ruritania, 1990–2010," Ruritanian Ministry of Agriculture, 2011.
without remarking on the correction? Strictly speaking, I'm changing the "official" title of the work, but the change is minimal and unlikely to keep anyone from finding the cited work.