[range.lazy.split.view] Use present only *when* bool-condition

Author: JohelEGP

source/ranges.tex

@@ -7491,7 +7491,7 @@
     Pattern @\exposid{pattern_}@ = Pattern();                               // \expos
 
     @\exposidnc{non-propagating-cache}@<iterator_t<V>> @\exposid{current_}@;              // \expos, present only
-                                                                // if \tcode{!\libconcept{forward_range}<V>}
+                                                                // when \tcode{!\libconcept{forward_range}<V>}
 
     // \ref{range.lazy.split.outer}, class template \tcode{lazy_split_view::\exposid{outer-iterator}}
     template<bool> struct @\exposidnc{outer-iterator}@;                       // \expos