[intro], [except.ctor] Fix index entries that use !see instead of |see.

Author: Eelis

source/exceptions.tex

@@ -346,7 +346,7 @@
 
 \rSec1[except.ctor]{Constructors and destructors}%
 \indextext{exception handling!constructors and destructors}%
-\indextext{stack unwinding!see exception handling, constructors and destructors}%
+\indextext{stack unwinding|see{exception handling, constructors and destructors}}%
 \indextext{constructor!exception~handling|see{exception handling, constructors and destructors}}%
 \indextext{destructor!exception~handling|see{exception handling, constructors and destructors}}
 

source/intro.tex

@@ -2,7 +2,7 @@
 \rSec0[intro]{General}
 
 \indextext{diagnostic message|see{message, diagnostic}}%
-\indexdefn{conditionally-supported behavior!see{behavior, conditionally-supported}}%
+\indexdefn{conditionally-supported behavior|see{behavior, conditionally-supported}}%
 \indextext{dynamic type|see{type, dynamic}}%
 \indextext{static type|see{type, static}}%
 \indextext{ill-formed program|see{program, ill-formed}}%