fix sentence beginning & dash

Author: schultzdavid

doc/Language/exceptions.rakudoc

@@ -246,7 +246,7 @@ Which would output:
       in block <unit> at exception.raku line 21
     =end code
 
-Since the C<CATCH> block is handling just the L<C<X::AdHoc>|/type/X::AdHoc> exception
+This is because the C<CATCH> block is handling just the L<C<X::AdHoc>|/type/X::AdHoc> exception
 thrown by the C<die> statement, but not the C<E> exception. In the
 absence of a C<CATCH> block, all exceptions will be contained and
 dropped, as indicated above. C<resume> will resume execution right after
@@ -255,7 +255,7 @@ Please consult the section on
 L<resuming of exceptions|/language/exceptions#Resuming_of_exceptions>
 for more information on this.
 
-A C<try>-block is a normal block and as such treats its last statement
+A C<try> block is a normal block and as such treats its last statement
 as the return value of itself. We can therefore use it as a right-hand
 side.