[locale.codecvt.virtuals] Fix garbled sentence

source/text.tex

@@ -2160,10 +2160,10 @@
 Stops if it encounters a character it cannot convert.
 It always leaves the \tcode{from_next} and \tcode{to_next} pointers
 pointing one beyond the last element successfully converted.
-If returns \tcode{noconv},
-\tcode{internT} and \tcode{externT} are the same type and
+If it returns \tcode{noconv},
+\tcode{internT} and \tcode{externT} are the same type, and
 the converted sequence is identical to
-the input sequence \range{from}{from\textunderscore\nobreak next}.
+the input sequence \range{from}{from\textunderscore\nobreak next},
 \tcode{to_next} is set equal to \tcode{to},
 the value of \tcode{state} is unchanged, and
 there are no changes to the values in \range{to}{to_end}.