[func.require] Convert restrictive 'which' to 'that'.

Author: zygoloid

source/utilities.tex

@@ -13935,7 +13935,7 @@
 A \defn{simple call wrapper} is a perfect forwarding call wrapper that meets
 the \oldconcept{CopyConstructible} and \oldconcept{CopyAssignable} requirements
 and whose copy constructor, move constructor, and assignment operators
-are constexpr functions which do not throw exceptions.
+are constexpr functions that do not throw exceptions.
 
 \pnum
 The copy/move constructor of an argument forwarding call wrapper has
@@ -15412,12 +15412,12 @@
 All placeholder types meet the \oldconcept{DefaultConstructible} and
 \oldconcept{CopyConstructible} requirements, and
 their default constructors and copy/move
-constructors are constexpr functions which
+constructors are constexpr functions that
 do not throw exceptions. It is \impldef{assignability of placeholder
 objects} whether
 placeholder types meet the \oldconcept{CopyAssignable} requirements,
 but if so, their copy assignment operators are
-constexpr functions which do not throw exceptions.
+constexpr functions that do not throw exceptions.
 
 \pnum
 Placeholders should be defined as: