[locale.moneypunct.virtuals] latex: remove redundant backslash-space

The backslash-space in "U.S.\ locales" can be replaced with a plain
space, because TeX treats a period after uppercase as an acronym (which
yields normal spacing). L4595, L4610 already use a plain space in
"U.S. locales", so this change improves consistency.

Author: morinmorin

source/text.tex

@@ -4673,7 +4673,7 @@
 \returns
 The number of digits after the decimal radix separator, if any.
 \begin{footnote}
-In common U.S.\ locales, this is 2.
+In common U.S. locales, this is 2.
 \end{footnote}
 \end{itemdescr}