Make the repeat/while docs viewable

lib/Language/control.pod

@@ -140,6 +140,8 @@ specify a final value for the block.
 
 =head2 loop
 
+=end comment
+
 =head2 repeat/while, repeat/until
 
 Perl 5 allows one to apply a statement modifier to a C<do> block such that
@@ -164,6 +166,8 @@ This can also be written quite naturally with C<until>:
         ...
     } until $x >= 10;
 
+=begin comment
+
 =head2 unless
 
 =head2 while