Update source/lex.tex

Co-authored-by: Davis Herring <[email protected]>

Author: jensmaurer

source/lex.tex

@@ -1810,8 +1810,8 @@
 \grammarterm{s-char}s or \grammarterm{r-char}s
 as defined by \tref{lex.string.literal}
 where $n$ is the number of encoded code units
-in the result of an evaluation of the \grammarterm{string-literal}
-were it to be evaluated (see below).
+that would result from an evaluation of the \grammarterm{string-literal}
+(see below).
 
 \begin{floattable}{String literals}{lex.string.literal}
 {llp{2.6cm}p{2.3cm}p{4.7cm}}