[conv.(prom, fpprom, integral, double)] Fix promotion conversions

source/expressions.tex

@@ -884,20 +884,17 @@
 
 \pnum
 \indextext{conversion!bool@\tcode{bool}}%
-If the destination type is \tcode{bool}, see~\ref{conv.bool}. If the
-source type is \tcode{bool}, the value \tcode{false} is converted to
-zero and the value \tcode{true} is converted to one.
-
-\pnum
 \indextext{conversion!to unsigned}%
 \indextext{conversion!to signed}%
+If the source type is \tcode{bool}, the value \tcode{false} is converted to
+zero and the value \tcode{true} is converted to one.
 Otherwise, the result is the unique value of the destination type
 that is congruent to the source integer modulo $2^N$,
 where $N$ is the width of the destination type.
 
 \pnum
-The conversions allowed as integral promotions are excluded from the set
-of integral conversions.
+The conversions performed by integral promotions and boolean conversions are
+excluded from the set of integral conversions.
 
 \rSec2[conv.double]{Floating-point conversions}
 
@@ -912,7 +909,7 @@
 Otherwise, the behavior is undefined.
 
 \pnum
-The conversions allowed as floating-point promotions are excluded from
+The conversion performed by floating-point promotion is excluded from
 the set of floating-point conversions.
 
 \rSec2[conv.fpint]{Floating-integral conversions}