[diagnostics] Minor spacing fixes.

Relax justification for a few awkward lines that contain extremely long trait names.

Author: tkoeppe

source/diagnostics.tex

@@ -1187,7 +1187,7 @@
     // \ref{syserr.errcode.modifiers}, modifiers
     void assign(int val, const error_category& cat) noexcept;
     template <class ErrorCodeEnum>
-        error_code& operator=(ErrorCodeEnum e) noexcept;
+      error_code& operator=(ErrorCodeEnum e) noexcept;
     void clear() noexcept;
 
     // \ref{syserr.errcode.observers}, observers
@@ -1253,7 +1253,7 @@
 \postconditions \tcode{*this == make_error_code(e)}.
 
 \pnum
-\remarks This constructor shall not participate in overload resolution unless\linebreak
+\remarks \raggedright This constructor shall not participate in overload resolution unless\linebreak
 \tcode{is_error_code_enum_v<ErrorCodeEnum>} is \tcode{true}.
 \end{itemdescr}
 
@@ -1283,7 +1283,7 @@
 \returns \tcode{*this}.
 
 \pnum
-\remarks This operator shall not participate in overload resolution unless\linebreak
+\remarks \raggedright This operator shall not participate in overload resolution unless\linebreak
 \tcode{is_error_code_enum_v<ErrorCodeEnum>} is \tcode{true}.
 \end{itemdescr}
 
@@ -1399,7 +1399,7 @@
     // \ref{syserr.errcondition.modifiers}, modifiers
     void assign(int val, const error_category& cat) noexcept;
     template <class ErrorConditionEnum>
-        error_condition& operator=(ErrorConditionEnum e) noexcept;
+      error_condition& operator=(ErrorConditionEnum e) noexcept;
     void clear() noexcept;
 
     // \ref{syserr.errcondition.observers}, observers
@@ -1457,7 +1457,7 @@
 \postconditions \tcode{*this == make_error_condition(e)}.
 
 \pnum
-\remarks This constructor shall not participate in overload resolution unless\linebreak
+\remarks \raggedright This constructor shall not participate in overload resolution unless\linebreak
 \tcode{is_error_condition_enum_v<ErrorConditionEnum>} is \tcode{true}.
 \end{itemdescr}
 
@@ -1488,7 +1488,7 @@
 \returns \tcode{*this}.
 
 \pnum
-\remarks This operator shall not participate in overload resolution unless\linebreak
+\remarks \raggedright This operator shall not participate in overload resolution unless\linebreak
 \tcode{is_error_condition_enum_v<ErrorConditionEnum>} is \tcode{true}.
 \end{itemdescr}
 
@@ -1663,10 +1663,11 @@
 application program interfaces.
 
 \pnum
-\begin{note} If an error represents an out-of-memory condition, implementations are
+\begin{note}
+If an error represents an out-of-memory condition, implementations are
 encouraged to throw an exception object of type \tcode{bad_alloc}~(\ref{bad.alloc}) rather
-than \tcode{system_error}. \end{note}
-
+than \tcode{system_error}.
+\end{note}
 \indexlibrary{\idxcode{system_error}}%
 \begin{codeblock}
 namespace std {
@@ -1675,10 +1676,8 @@
     system_error(error_code ec, const string& what_arg);
     system_error(error_code ec, const char* what_arg);
     system_error(error_code ec);
-    system_error(int ev, const error_category& ecat,
-        const string& what_arg);
-    system_error(int ev, const error_category& ecat,
-        const char* what_arg);
+    system_error(int ev, const error_category& ecat, const string& what_arg);
+    system_error(int ev, const error_category& ecat, const char* what_arg);
     system_error(int ev, const error_category& ecat);
     const error_code& code() const noexcept;
     const char* what() const noexcept override;
@@ -1733,8 +1732,7 @@
 
 \indexlibrary{\idxcode{system_error}!constructor}%
 \begin{itemdecl}
-system_error(int ev, const error_category& ecat,
-  const string& what_arg);
+system_error(int ev, const error_category& ecat, const string& what_arg);
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -1749,8 +1747,7 @@
 
 \indexlibrary{\idxcode{system_error}!constructor}%
 \begin{itemdecl}
-system_error(int ev, const error_category& ecat,
-  const char* what_arg);
+system_error(int ev, const error_category& ecat, const char* what_arg);
 \end{itemdecl}
 
 \begin{itemdescr}