patch 8.2.4939: matchfuzzypos() with "matchseq" does not have all positions

Problem:    matchfuzzypos() with "matchseq" does not have all positions.
Solution:   Also add a position for white space. (closes #10404)
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 60fe91f..7d62583 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -5682,10 +5682,9 @@
 
 		The optional {dict} argument always supports the following
 		items:
-		    matchseq	When this item is present and {str} contains
-				multiple words separated by white space, then
-				returns only matches that contain the words in
-				the given sequence.
+		    matchseq	When this item is present return only matches
+				that contain the characters in {str} in the
+				given sequence.
 
 		If {list} is a list of dictionaries, then the optional {dict}
 		argument supports the following additional items: