Add "excluding virtual text"

Author: dstein64

doc/scrollview.txt

@@ -265,15 +265,15 @@ scrollview_hide_on_float_intersect         *scrollview_hide_on_float_intersect*
 scrollview_hide_on_text_intersect          *scrollview_hide_on_text_intersect*
 (experimental)         |Boolean| specifying whether each scrollbar or sign
                        becomes hidden (not shown) when it would otherwise
-                       intersect with text. The functionality may not work for
-                       lines where the last character spans multiple cells
-                       (only the first cell of the character would be
-                       considered for intersection). For lines with concealed
-                       text, signs and the scrollbar can become hidden when
-                       they don't intersect text. The processing demands when
-                       enabling this option may result in noticeable lag under
-                       certain environments, especially on older hardware.
-                       Defaults to |v:false|.
+                       intersect with text (excluding virtual text). The
+                       functionality may not work for lines where the last
+                       character spans multiple cells (only the first cell of
+                       the character would be considered for intersection).
+                       For lines with concealed text, signs and the scrollbar
+                       can become hidden when they don't intersect text. The
+                       processing demands when enabling this option may result
+                       in noticeable lag under certain environments,
+                       especially on older hardware. Defaults to |v:false|.
 
 scrollview_hover                           *scrollview_hover*
                        |Boolean| specifying whether the highlighting of