[facet.ctype.char.members, locale.codecvt.virtuals] Spaces around operators (#7624)

Author: Andreas-Krug

source/text.tex

@@ -1792,7 +1792,7 @@
 \pnum
 \expects
 Either \tcode{tbl == nullptr} is \tcode{true} or
-\range{tbl}{tbl+table_size} is a valid range.
+\range{tbl}{tbl + table_size} is a valid range.
 
 \pnum
 \effects
@@ -2334,18 +2334,18 @@
 \pnum
 \effects
 The effect on the \tcode{state} argument is as if
-it called \tcode{do_in(state, from, from_end, from, to, to+max, to)}
+it called \tcode{do_in(state, from, from_end, from, to, to + max, to)}
 for \tcode{to} pointing to a buffer of at least \tcode{max} elements.
 
 \pnum
 \returns
-\tcode{(from_next-from)} where
+\tcode{(from_next - from)} where
 \tcode{from_next} is the largest value in the range \crange{from}{from_end}
 such that the sequence of values in the range \range{from}{from_next}
 represents
 \tcode{max} or fewer valid complete characters of type \tcode{internT}.
 The specialization \tcode{codecvt<char, char, mbstate_t>},
-returns the lesser of \tcode{max} and \tcode{(from_end-from)}.
+returns the lesser of \tcode{max} and \tcode{(from_end - from)}.
 \end{itemdescr}
 
 \indexlibrarymember{codecvt}{do_max_length}%