[locale.codecvt] Make codecvt nicer

Addresses #693 for locales.tex.

Author: tkoeppe

source/locales.tex

@@ -2259,46 +2259,52 @@
   };
 
   template <class internT, class externT, class stateT>
-  class codecvt : public locale::facet, public codecvt_base {
-  public:
-    using intern_type = internT;
-    using extern_type = externT;
-    using state_type  = stateT;
-
-    explicit codecvt(size_t refs = 0);
-
-    result out(stateT& state,
-               const internT* from, const internT* from_end, const internT*& from_next,
-               externT*   to,       externT* to_end, externT*& to_next) const;
-    result unshift(stateT& state,
-                   externT*   to,        externT* to_end, externT*& to_next) const;
-    result in(stateT& state,
-              const externT* from, const externT* from_end, const externT*& from_next,
-              internT*   to,       internT* to_end, internT*& to_next) const;
-    int encoding() const noexcept;
-    bool always_noconv() const noexcept;
-    int length(stateT&, const externT* from, const externT* end,
-               size_t max) const;
-    int max_length() const noexcept;
-
-    static locale::id id;
-
-  protected:
-    ~codecvt();
-    virtual result do_out(stateT& state,
-                          const internT* from, const internT* from_end, const internT*& from_next,
-                          externT* to,         externT* to_end, externT*& to_next) const;
-    virtual result do_in(stateT& state,
-                         const externT* from, const externT* from_end, const externT*& from_next,
-                         internT* to,         internT* to_end, internT*& to_next) const;
-    virtual result do_unshift(stateT& state,
-                              externT* to,         externT* to_end, externT*& to_next) const;
-    virtual int do_encoding() const noexcept;
-    virtual bool do_always_noconv() const noexcept;
-    virtual int do_length(stateT&, const externT* from,
-                          const externT* end, size_t max) const;
-    virtual int do_max_length() const noexcept;
-  };
+    class codecvt : public locale::facet, public codecvt_base {
+    public:
+      using intern_type = internT;
+      using extern_type = externT;
+      using state_type  = stateT;
+
+      explicit codecvt(size_t refs = 0);
+
+      result out(
+          stateT& state,
+          const internT* from, const internT* from_end, const internT*& from_next,
+                externT*   to,       externT*   to_end,       externT*&   to_next) const;
+      result unshift(
+          stateT& state,
+                externT*    to,      externT*   to_end,       externT*&   to_next) const;
+      result in(
+          stateT& state,
+          const externT* from, const externT* from_end, const externT*& from_next,
+                internT*   to,       internT*   to_end,       internT*&   to_next) const;
+
+      int encoding() const noexcept;
+      bool always_noconv() const noexcept;
+      int length(stateT&, const externT* from, const externT* end, size_t max) const;
+      int max_length() const noexcept;
+
+      static locale::id id;
+
+    protected:
+      ~codecvt();
+      virtual result do_out(
+          stateT& state,
+          const internT* from, const internT* from_end, const internT*& from_next,
+                externT* to,         externT*   to_end,       externT*&   to_next) const;
+      virtual result do_in(
+          stateT& state,
+          const externT* from, const externT* from_end, const externT*& from_next,
+                internT* to,         internT*   to_end,       internT*&   to_next) const;
+      virtual result do_unshift(
+          stateT& state,
+                externT* to,         externT*   to_end,       externT*&   to_next) const;
+
+      virtual int do_encoding() const noexcept;
+      virtual bool do_always_noconv() const noexcept;
+      virtual int do_length(stateT&, const externT* from, const externT* end, size_t max) const;
+      virtual int do_max_length() const noexcept;
+    };
 }
 \end{codeblock}
 
@@ -5278,9 +5284,9 @@
 The specializations required in Table~\ref{tab:localization.required.specializations}~(\ref{locale.category}), namely
 \tcode{moneypunct<char>},
 \tcode{moneypunct<\brk{}wchar_t>},
-\tcode{moneypunct<char,true>},
+\tcode{moneypunct<char, true>},
 and
-\tcode{moneypunct<wchar_t,true>},
+\tcode{moneypunct<wchar_t, true>},
 return an object of type
 \tcode{pattern}
 initialized to