[diff.cpp23] Fix order of subclauses.

This was accidentally broken by the application of the previous motion.

Author: tkoeppe

source/compatibility.tex

@@ -107,6 +107,31 @@
                                 // changed according to the global C locale
 \end{codeblock}
 
+\rSec2[diff.cpp23.containers]{\ref{containers}: containers library}
+
+\diffref{span.overview}
+\change
+\tcode{span<const T>} is constructible from \tcode{initializer_list<T>}.
+\rationale
+Permit passing a braced initializer list to a function taking \tcode{span}.
+\effect
+Valid \CppXXIII{} code that relies on the lack of this constructor
+may refuse to compile, or change behavior in this revision of \Cpp{}.
+For example:
+\begin{codeblock}
+void one(pair<int, int>);       // \#1
+void one(span<const int>);      // \#2
+void t1() { one({1, 2}); }      // ambiguous between \#1 and \#2; previously called \#1
+
+void two(span<const int, 2>);
+void t2() { two({{1, 2}}); }    // ill-formed; previously well-formed
+
+void *a[10];
+int x = span<void* const>{a, 0}.size();     // \tcode{x} is \tcode{2}; previously \tcode{0}
+any b[10];
+int y = span<const any>{b, b + 10}.size();  // \tcode{y} is \tcode{2}; previously \tcode{10}
+\end{codeblock}
+
 \rSec2[diff.cpp23.depr]{\ref{depr}: compatibility features}
 
 \nodiffref
@@ -141,31 +166,6 @@
 The old functionality can be achieved by calling \tcode{shrink_to_fit()} instead,
 or the function call can be safely eliminated with no side effects.
 
-\rSec2[diff.cpp23.containers]{\ref{containers}: containers library}
-
-\diffref{span.overview}
-\change
-\tcode{span<const T>} is constructible from \tcode{initializer_list<T>}.
-\rationale
-Permit passing a braced initializer list to a function taking \tcode{span}.
-\effect
-Valid \CppXXIII{} code that relies on the lack of this constructor
-may refuse to compile, or change behavior in this revision of \Cpp{}.
-For example:
-\begin{codeblock}
-void one(pair<int, int>);       // \#1
-void one(span<const int>);      // \#2
-void t1() { one({1, 2}); }      // ambiguous between \#1 and \#2; previously called \#1
-
-void two(span<const int, 2>);
-void t2() { two({{1, 2}}); }    // ill-formed; previously well-formed
-
-void *a[10];
-int x = span<void* const>{a, 0}.size();     // \tcode{x} is \tcode{2}; previously \tcode{0}
-any b[10];
-int y = span<const any>{b, b + 10}.size();  // \tcode{y} is \tcode{2}; previously \tcode{10}
-\end{codeblock}
-
 \rSec1[diff.cpp20]{\Cpp{} and ISO \CppXX{}}
 
 \rSec2[diff.cpp20.general]{General}