Fix alignment issues involving /see below/ and /implementation-defined/

placeholders in library text.

Author: zygoloid

source/iterators.tex

@@ -2172,7 +2172,7 @@
     typedef Iterator                                              pointer;
     typedef typename iterator_traits<Iterator>::value_type        value_type;
     typedef typename iterator_traits<Iterator>::iterator_category iterator_category;
-    typedef @\seebelow@                                             reference;
+    typedef @\seebelownc@                                             reference;
 
     move_iterator();
     explicit move_iterator(Iterator i);

source/macros.tex

@@ -200,14 +200,17 @@
 \newcommand{\EXPO}[1]{\textit{#1}}
 \newcommand{\expos}{\EXPO{exposition only}}
 \newcommand{\impdef}{\EXPO{implementation-defined}}
+\newcommand{\impdefnc}{\EXPO{implementation-defined\nocorr}}
 \newcommand{\impdefx}[1]{\indeximpldef{#1}\EXPO{implementation-defined}}
 \newcommand{\notdef}{\EXPO{not defined}}
 
 \newcommand{\UNSP}[1]{\textit{\texttt{#1}}}
+\newcommand{\UNSPnc}[1]{\textit{\texttt{#1}\nocorr}}
 \newcommand{\unspec}{\UNSP{unspecified}}
-\newcommand{\unspecnc}{\textit{\texttt{unspecified}\nocorr}}
+\newcommand{\unspecnc}{\UNSPnc{unspecified}}
 \newcommand{\unspecbool}{\UNSP{unspecified-bool-type}}
 \newcommand{\seebelow}{\UNSP{see below}}
+\newcommand{\seebelownc}{\UNSPnc{see below}}
 \newcommand{\unspecuniqtype}{\UNSP{unspecified unique type}}
 \newcommand{\unspecalloctype}{\UNSP{unspecified allocator type}}
 

source/strings.tex

@@ -879,14 +879,14 @@
     typedef typename allocator_traits<Allocator>::size_type         size_type;
     typedef typename allocator_traits<Allocator>::difference_type   difference_type;
 
-    typedef value_type& reference;
-    typedef const value_type&   const_reference;
+    typedef value_type&                                             reference;
+    typedef const value_type&                                       const_reference;
     typedef typename allocator_traits<Allocator>::pointer           pointer;
     typedef typename allocator_traits<Allocator>::const_pointer     const_pointer;
 
-    typedef @\impdef@              iterator;       // See \ref{container.requirements}
-    typedef @\impdef@              const_iterator; // See \ref{container.requirements}
-    typedef std::reverse_iterator<iterator> reverse_iterator;
+    typedef @\impdefnc@                iterator;       // See \ref{container.requirements}
+    typedef @\impdefnc@                const_iterator; // See \ref{container.requirements}
+    typedef std::reverse_iterator<iterator>       reverse_iterator;
     typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
     static const size_type npos = -1;
 
@@ -952,9 +952,9 @@
     reference       at(size_type n);
 
     const charT& front() const;
-    charT& front();
+    charT&       front();
     const charT& back() const;
-    charT& back();
+    charT&       back();
 
     // \ref{string.modifiers}, modifiers:
     basic_string& operator+=(const basic_string& str);

source/utilities.tex

@@ -3197,7 +3197,7 @@
 \begin{codeblock}
 namespace std {
   template <class Ptr> struct pointer_traits {
-    typedef Ptr       pointer;
+    typedef Ptr @\itcorr@      pointer;
     typedef @\seebelow@ element_type;
     typedef @\seebelow@ difference_type;