Parenthesize some \refs. (#1436)

Author: Eelis

source/containers.tex

@@ -3857,7 +3857,7 @@
 \pnum
 An incomplete type \tcode{T} may be used when instantiating \tcode{forward_list}
 if the allocator satisfies the
-allocator completeness requirements~\ref{allocator.requirements.completeness}.
+allocator completeness requirements~(\ref{allocator.requirements.completeness}).
 \tcode{T} shall be complete before any member of the resulting specialization
 of \tcode{forward_list} is referenced.
 
@@ -4571,7 +4571,7 @@
 \pnum
 An incomplete type \tcode{T} may be used when instantiating \tcode{list}
 if the allocator satisfies the
-allocator completeness requirements~\ref{allocator.requirements.completeness}.
+allocator completeness requirements~(\ref{allocator.requirements.completeness}).
 \tcode{T} shall be complete before any member of the resulting specialization
 of \tcode{list} is referenced.
 
@@ -5243,7 +5243,7 @@
 \pnum
 An incomplete type \tcode{T} may be used when instantiating \tcode{vector}
 if the allocator satisfies the
-allocator completeness requirements~\ref{allocator.requirements.completeness}.
+allocator completeness requirements~(\ref{allocator.requirements.completeness}).
 \tcode{T} shall be complete before any member of the resulting specialization
 of \tcode{vector} is referenced.
 

source/diagnostics.tex

@@ -1664,7 +1664,7 @@
 
 \pnum
 \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
+encouraged to throw an exception object of type \tcode{bad_alloc}~(\ref{bad.alloc}) rather
 than \tcode{system_error}. \end{note}
 
 \indexlibrary{\idxcode{system_error}}%

source/lib-intro.tex

@@ -2126,7 +2126,7 @@
 
 \begin{itemize}
 \item \tcode{X} is a complete type, and
-\item all the member types of \tcode{allocator_traits<X>}~\ref{allocator.traits}
+\item all the member types of \tcode{allocator_traits<X>}~(\ref{allocator.traits})
   other than \tcode{value_type} are complete types.
 \end{itemize}
 

source/regex.tex

@@ -848,7 +848,7 @@
 \tcode{match_prev_avail} &
 \verb!--first! is a valid iterator position. When this flag is
 set the flags match_not_bol and match_not_bow shall be ignored by the
-regular expression algorithms~\ref{re.alg} and iterators~\ref{re.iter}.
+regular expression algorithms~(\ref{re.alg}) and iterators~(\ref{re.iter}).
 \\ \rowsep
 %
 \indexlibrary{\idxcode{format_default}}%
@@ -4158,8 +4158,8 @@
 The behavior of the internal finite state machine representation when used to match a
 sequence of characters is as described in ECMA-262.
 The behavior is modified according
-to any match_flag_type flags~\ref{re.matchflag} specified when using the regular expression
-object in one of the regular expression algorithms~\ref{re.alg}. The behavior is also
+to any match_flag_type flags~(\ref{re.matchflag}) specified when using the regular expression
+object in one of the regular expression algorithms~(\ref{re.alg}). The behavior is also
 localized by interaction with the traits class template parameter as follows:
 \begin{itemize}
 \item During matching of a regular expression finite state machine

source/utilities.tex

@@ -7683,7 +7683,7 @@
 
 \pnum
 All specializations of the default allocator satisfy the
-allocator completeness requirements~\ref{allocator.requirements.completeness}.
+allocator completeness requirements~(\ref{allocator.requirements.completeness}).
 
 \indexlibrary{\idxcode{allocator}}%
 \begin{codeblock}