[basic.ios.members] clarify equality expressions

Author: Eisenwave

source/iostreams.tex

@@ -1983,7 +1983,7 @@
 
 \pnum
 \ensures
-\tcode{tiestr == tie()}.
+\tcode{tiestr == tie()} is \keyword{true}.
 
 \pnum
 \returns
@@ -2017,7 +2017,7 @@
 
 \pnum
 \ensures
-\tcode{sb == rdbuf()}.
+\tcode{sb == rdbuf()} is \keyword{true}.
 
 \pnum
 \returns
@@ -2037,7 +2037,7 @@
 \tcode{ios_base::imbue(loc)}\iref{ios.base.locales}
 and
 if
-\tcode{rdbuf() != 0}
+\tcode{rdbuf() != 0} is \keyword{true}
 then
 \tcode{rdbuf()->pubimbue(loc)}\iref{streambuf.locales}.
 
@@ -2106,7 +2106,7 @@
 \pnum
 \effects
 If
-\tcode{(this == addressof(rhs))} is \tcode{true}
+\tcode{this == addressof(rhs)} is \tcode{true},
 does nothing.
 Otherwise assigns to the member objects of
 \tcode{*this}