[over.built] Convert to singular.

Author: zygoloid

source/overloading.tex

@@ -4029,8 +4029,8 @@
 
 \pnum
 For every pair of types \tcode{\placeholder{L}} and \tcode{\placeholder{R}},
-where \tcode{\placeholder{L}} and \tcode{\placeholder{R}} are each
-floating-point or promoted integral types,
+where each of \tcode{\placeholder{L}} and \tcode{\placeholder{R}} is a
+floating-point or promoted integral type,
 there exist candidate operator functions of the form
 \begin{codeblock}
 @\placeholder{LR}@      operator*(@\placeholder{L}@, @\placeholder{R}@);
@@ -4210,8 +4210,8 @@
 
 \pnum
 For every pair of types \tcode{\placeholder{L}} and \tcode{\placeholder{R}},
-where \tcode{\placeholder{L}} and \tcode{\placeholder{R}} are each
-floating-point or promoted integral types,
+where each of \tcode{\placeholder{L}} and \tcode{\placeholder{R}} is a
+floating-point or promoted integral type,
 there exist candidate operator functions of the form
 \begin{codeblock}
 @\placeholder{LR}@      operator?:(bool, @\placeholder{L}@, @\placeholder{R}@);