Address review comments

Author: cpplearner

source/iostreams.tex

@@ -4585,13 +4585,11 @@
 \tcode{setstate(failbit | eofbit)}
 (which may throw
 \tcode{ios_base::failure}).
+After any preparation is completed, \exposid{ok_} is set to the value of \tcode{is.good()}.
 
 \pnum
 \remarks
-The constructor
-\begin{codeblock}
-explicit sentry(basic_istream& is, bool noskipws = false)
-\end{codeblock}
+This constructor
 uses the currently imbued locale in \tcode{is},
 to determine whether the next input character is
 whitespace or not.
@@ -4606,13 +4604,6 @@
 \end{codeblock}
 
 \pnum
-If, after any preparation is completed,
-\tcode{is.good()}
-is
-\tcode{true},
-\tcode{\exposid{ok_} != false};
-otherwise,
-\tcode{\exposid{ok_} == false}.
 During preparation, the constructor may call
 \tcode{setstate(failbit)}
 (which may throw