[iostream.format] Minor rewording to be more accurate and fit the lines better

Author: tkoeppe

source/iostreams.tex

@@ -4308,8 +4308,7 @@
 \pnum
 \effects
 Constructs an object of class
-\tcode{basic_istream},
-assigning initial values to the base class by calling
+\tcode{basic_istream}, initializing the base class subobject with
 \tcode{basic_ios::init(sb)}~(\ref{basic.ios.cons}).
 
 \pnum
@@ -4462,7 +4461,9 @@
 \pnum
 \remarks
 The constructor
-\tcode{explicit sentry(basic_istream<charT, traits>\& is, bool noskipws = false)}
+\begin{codeblock}
+explicit sentry(basic_istream<charT, traits>& is, bool noskipws = false)
+\end{codeblock}
 uses the currently imbued locale in \tcode{is},
 to determine whether the next input character is
 whitespace or not.
@@ -4759,18 +4760,10 @@
 \pnum
 Characters are extracted and stored until any of the following occurs:
 \begin{itemize}
-\item
-\tcode{n-1}
-characters are stored;
-\item
-end of file occurs on the input sequence;
-\item
-\tcode{ct.is(ct.space, c)}
-is
-\tcode{true}
-for the next available input character \tcode{c},
-where \tcode{ct} is
-\tcode{use_facet<ctype<\brk{}charT>>(in.getloc())}.
+\item \tcode{n-1} characters are stored;
+\item end of file occurs on the input sequence;
+\item letting \tcode{ct} be \tcode{use_facet<ctype<charT>>(in.getloc())},
+\tcode{ct.is(ct.space, c)} is \tcode{true}.
 \end{itemize}
 
 \pnum
@@ -5651,9 +5644,8 @@
 \begin{itemdescr}
 \pnum
 \effects
-Constructs an object of class
-\tcode{basic_iostream},
-assigning initial values to the base classes by calling
+Constructs an object of class \tcode{basic_iostream},
+initializing the base class subobjects with
 \tcode{basic_istream<charT, traits>(sb)}~(\ref{istream})
 and
 \tcode{basic_ostream<charT, traits>(sb)}~(\ref{ostream}).
@@ -5892,8 +5884,7 @@
 \pnum
 \effects
 Constructs an object of class
-\tcode{basic_ostream},
-assigning initial values to the base class by calling
+\tcode{basic_ostream}, initializing the base class subobject with
 \tcode{basic_ios<charT, traits>::init(sb)}~(\ref{basic.ios.cons}).
 
 \pnum