patch 9.0.1762: Not able to get the virtual text property

Problem:  Not able to get the virtual text property
Solution: Make prop_list() return virtual text and alignment

closes: #12860

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/runtime/doc/textprop.txt b/runtime/doc/textprop.txt
index d69355b..0d830f6 100644
--- a/runtime/doc/textprop.txt
+++ b/runtime/doc/textprop.txt
@@ -335,6 +335,10 @@
 		   length	length in bytes, one more if line break is
 				included
 		   id		property ID
+		   text		text to be displayed before {col}.  Only
+				present for |virtual-text| properties.
+		   text_align	alignment property of |virtual-text|.
+		   text_wrap	specifies whether |virtual-text| is wrapped.
 		   type		name of the property type, omitted if
 				the type was deleted
 		   type_bufnr	buffer number for which this type was defined;