[range.drop.view] Fix typo "requirement" -> "required".

zygoloid · zygoloid · commit f0256ab73cd6 · 2019-08-05T23:56:19.000-07:00
diff --git a/source/ranges.tex b/source/ranges.tex
@@ -4032,7 +4032,7 @@
 
 \pnum
 \remarks
-In order to provide the amortized constant-time complexity requirement
+In order to provide the amortized constant-time complexity required
 by the \tcode{Range} concept,
 the first overload caches the result within the \tcode{drop_view}
 for use on subsequent calls.
