runtime(doc): Improve 'wildmode' setting desciption

closes: #17100

Signed-off-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index a2f5f1f..9fab3f4 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -9638,55 +9638,65 @@
 						*'wildmode'* *'wim'*
 'wildmode' 'wim'	string	(Vim default: "full")
 			global
-	Completion mode that is used for the character specified with
-	'wildchar'.  It is a comma-separated list of up to four parts.  Each
-	part specifies what to do for each consecutive use of 'wildchar'.  The
-	first part specifies the behavior for the first use of 'wildchar',
-	The second part for the second use, etc.
+	Completion mode used for the character specified with 'wildchar'.
+	This option is a comma-separated list of up to four parts,
+	corresponding to the first, second, third, and fourth presses of
+	'wildchar'.  Each part is a colon-separated list of completion
+	behaviors, which are applied simultaneously during that phase.
 
-	Each part consists of a colon separated list consisting of the
-	following possible values:
-	""		Complete only the first match.
-	"full"		Complete the next full match.  After the last match,
-			the original string is used and then the first match
-			again.  Will also start 'wildmenu' if it is enabled.
-	"longest"	Complete till longest common string.  If this doesn't
-			result in a longer string, use the next part.
-	"list"		When more than one match, list all matches.
-	"lastused"	When completing buffer names and more than one buffer
-			matches, sort buffers by time last used (other than
-			the current buffer).
-	"noselect"	Do not pre-select first menu item and start 'wildmenu'
-			if it is enabled.
-	When there is only a single match, it is fully completed in all cases
-	except when "noselect" is present.
+	The possible behavior values are:
+	""		Only complete (insert) the first match.  No further
+			matches are cycled or listed.
+	"full"		Complete the next full match.  Cycles through all
+			matches, returning to the original input after the
+			last match.  If 'wildmenu' is enabled, it will be
+			shown.
+	"longest"	Complete to the longest common substring.  If this
+			doesn't extend the input, the next 'wildmode' part is
+			used.
+	"list"		If multiple matches are found, list all of them.
+	"lastused"	When completing buffer names, sort them by most
+			recently used (excluding the current buffer).  Only
+			applies to buffer name completion.
+	"noselect"	If 'wildmenu' is enabled, show the menu but do not
+			preselect the first item.
+	If only one match exists, it is completed fully—unless "noselect" is
+	specified.
 
-	Examples of useful colon-separated values:
-	"longest:full"	Like "longest", but also start 'wildmenu' if it is
-			enabled.  Will not complete to the next full match.
-	"list:full"	When more than one match, list all matches and
-			complete first match.
-	"list:longest"	When more than one match, list all matches and
-			complete till longest common string.
-	"list:lastused" When more than one buffer matches, list all matches
-			and sort buffers by time last used (other than the
-			current buffer).
+	Some useful combinations of colon-separated values:
+	"longest:full"		Start with the longest common string and show
+				'wildmenu' (if enabled).  Does not cycle
+				through full matches.
+	"list:full"		List all matches and complete first match.
+	"list:longest"		List all matches and complete till the longest
+				common prefix.
+	"list:lastused"		List all matches.  When completing buffers,
+				sort them by most recently used (excluding the
+				current buffer).
+	"noselect:lastused"	Do not preselect the first item in 'wildmenu'
+				if it is active.  When completing buffers,
+				sort them by most recently used (excluding the
+				current buffer).
 
 	Examples: >
 		:set wildmode=full
-<	Complete first full match, next match, etc.  (the default) >
+<	Complete full match on every press (default behavior) >
 		:set wildmode=longest,full
-<	Complete longest common string, then each full match >
+<	First press: longest common substring
+	Second press: cycle through full matches >
 		:set wildmode=list:full
-<	List all matches and complete each full match >
+<	First press: list all matches and complete the first one >
 		:set wildmode=list,full
-<	List all matches without completing, then each full match >
+<	First press: list matches only
+	Second press: complete full matches >
 		:set wildmode=longest,list
-<	Complete longest common string, then list alternatives >
+<	First press: longest common substring
+	Second press: list all matches >
 		:set wildmode=noselect:full
-<	Display 'wildmenu' without completing, then each full match >
+<	Show 'wildmenu' without completing or selecting on first press
+	Cycle full matches on second press >
 		:set wildmode=noselect:lastused,full
-<	Same as above, but sort buffers by time last used.
+<	Same as above, but buffer matches are sorted by last used
 	More info here: |cmdline-completion|.
 
 						*'wildoptions'* *'wop'*