Update runtime files.

runtime/doc/builtin.txt

@@ -5107,7 +5107,7 @@ len({expr})	The result is a Number, which is the length of the argument.
 		When {expr} is a |Blob| the number of bytes is returned.
 		When {expr} is a |Dictionary| the number of entries in the
 		|Dictionary| is returned.
-		Otherwise an error is given.
+		Otherwise an error is given and returns zero.
 
 		Can also be used as a |method|: >
 			mylist->len()
@@ -5200,6 +5200,7 @@ line({expr} [, {winid}])				*line()*
 		|getpos()|.
 		With the optional {winid} argument the values are obtained for
 		that window instead of the current window.
+		Returns 0 for invalid values of {expr} and {winid}.
 		Examples: >
 			line(".")		line number of the cursor
 			line(".", winid)	idem, in window "winid"
@@ -5267,6 +5268,8 @@ list2str({list} [, {utf8}])				*list2str()*
 		With UTF-8 composing characters work as expected: >
 			list2str([97, 769])	returns "á"
 <
+		Returns an empty string on error.
+
 		Can also be used as a |method|: >
 			GetList()->list2str()
 
@@ -5339,6 +5342,8 @@ listener_add({callback} [, {buf}])			*listener_add()*
 		The {callback} is also not invoked when the buffer is
 		unloaded, use the |BufUnload| autocmd event for that.
 
+		Returns zero if {callback} or {buf} is invalid.
+
 		Can also be used as a |method|, the base is passed as the
 		second argument: >
 			GetBuffer()->listener_add(callback)
@@ -5371,6 +5376,7 @@ log({expr})						*log()*
 		Return the natural logarithm (base e) of {expr} as a |Float|.
 		{expr} must evaluate to a |Float| or a |Number| in the range
 		(0, inf].
+		Returns 0.0 if {expr} is not a |Float| or a |Number|.
 		Examples: >
 			:echo log(10)
 <			2.302585 >
@@ -5386,6 +5392,7 @@ log({expr})						*log()*
 log10({expr})						*log10()*
 		Return the logarithm of Float {expr} to base 10 as a |Float|.
 		{expr} must evaluate to a |Float| or a |Number|.
+		Returns 0.0 if {expr} is not a |Float| or a |Number|.
 		Examples: >
 			:echo log10(1000)
 <			3.0 >
@@ -5484,8 +5491,9 @@ maparg({name} [, {mode} [, {abbr} [, {dict}]]])			*maparg()*
 		below. To get a list of all mappings see |maplist()|.
 
 		When there is no mapping for {name}, an empty String is
-		returned.  When the mapping for {name} is empty, then "<Nop>"
-		is returned.
+		returned if {dict} is FALSE, otherwise returns an empty Dict.
+		When the mapping for {name} is empty, then "<Nop>" is
+		returned.
 
 		The {name} can have special key names, like in the ":map"
 		command.
@@ -5778,6 +5786,8 @@ matchadd({group}, {pattern} [, {priority} [, {id} [, {dict}]]])
 		The number of matches is not limited, as it is the case with
 		the |:match| commands.
 
+		Returns -1 on error.
+
 		Example: >
 			:highlight MyGroup ctermbg=green guibg=green
 			:let m = matchadd("MyGroup", "TODO")
@@ -5816,6 +5826,8 @@ matchaddpos({group}, {pos} [, {priority} [, {id} [, {dict}]]])
 
 		The maximum number of positions in {pos} is 8.
 
+		Returns -1 on error.
+
 		Example: >
 			:highlight MyGroup ctermbg=green guibg=green
 			:let m = matchaddpos("MyGroup", [[23, 24], 34])
@@ -6285,6 +6297,7 @@ pathshorten({path} [, {len}])				*pathshorten()*
 			:echo pathshorten('~/.vim/autoload/myfile.vim', 2)
 <			~/.vi/au/myfile.vim ~
 		It doesn't matter if the path exists or not.
+		Returns an empty string on error.
 
 		Can also be used as a |method|: >
 			GetDirectories()->pathshorten()
@@ -6314,6 +6327,7 @@ popup_ functions are documented here: |popup-functions|
 pow({x}, {y})						*pow()*
 		Return the power of {x} to the exponent {y} as a |Float|.
 		{x} and {y} must evaluate to a |Float| or a |Number|.
+		Returns 0.0 if {x} or {y} is not a |Float| or a |Number|.
 		Examples: >
 			:echo pow(3, 3)
 <			27.0 >
@@ -6690,6 +6704,7 @@ rand([{expr}])						*rand()* *random*
 		{expr} can be initialized by |srand()| and will be updated by
 		rand().  If {expr} is omitted, an internal seed value is used
 		and updated.
+		Returns -1 if {expr} is invalid.
 
 		Examples: >
 			:echo rand()
@@ -6779,6 +6794,8 @@ readdir({directory} [, {expr} [, {dict}]])			*readdir()*
 		  endfunction
 		  echo s:tree(".")
 <
+		Returns an empty List on error.
+
 		Can also be used as a |method|: >
 			GetDirName()->readdir()
 <
@@ -6837,7 +6854,6 @@ readdirex({directory} [, {expr} [, {dict}]])			*readdirex()*
 		For example, to get a list of all files in the current
 		directory without sorting the individual entries: >
 		  readdirex(dirname, '1', #{sort: 'none'})
-
 <
 		Can also be used as a |method|: >
 			GetDirName()->readdirex()
@@ -6927,8 +6943,8 @@ reltime([{start} [, {end}]])				*reltime()*
 		and {end}.
 
 		The {start} and {end} arguments must be values returned by
-		reltime().  If there is an error zero is returned in legacy
-		script, in Vim9 script an error is given.
+		reltime().  If there is an error an empty List is returned in
+		legacy script, in Vim9 script an error is given.
 
 		Can also be used as a |method|: >
 			GetStart()->reltime()
@@ -7047,7 +7063,8 @@ remote_peek({serverid} [, {retvar}])		*remote_peek()*
 remote_read({serverid}, [{timeout}])			*remote_read()*
 		Return the oldest available reply from {serverid} and consume
 		it.  Unless a {timeout} in seconds is given, it blocks until a
-		reply is available.
+		reply is available.  Returns an empty string, if a reply is
+		not available or on error.
 		See also |clientserver|.
 		This function is not available in the |sandbox|.
 		{only available when compiled with the |+clientserver| feature}
@@ -7106,6 +7123,7 @@ remove({list}, {idx} [, {end}])				*remove()*
 		item as {end} a list with one item is returned.  When {end}
 		points to an item before {idx} this is an error.
 		See |list-index| for possible values of {idx} and {end}.
+		Returns zero on error.
 		Example: >
 			:echo "last item: " .. remove(mylist, -1)
 			:call remove(mylist, 0, 9)
@@ -7122,6 +7140,7 @@ remove({blob}, {idx} [, {end}])
 		return a |Blob| with these bytes.  When {idx} points to the same
 		byte as {end} a |Blob| with one byte is returned.  When {end}
 		points to a byte before {idx} this is an error.
+		Returns zero on error.
 		Example: >
 			:echo "last byte: " .. remove(myblob, -1)
 			:call remove(mylist, 0, 9)
@@ -7131,6 +7150,7 @@ remove({dict}, {key})
 		Example: >
 			:echo "removed " .. remove(dict, "one")
 <		If there is no {key} in {dict} this is an error.
+		Returns zero on error.
 
 rename({from}, {to})					*rename()*
 		Rename the file by the name {from} to the name {to}.  This
@@ -7179,6 +7199,7 @@ reverse({object})					*reverse()*
 		Reverse the order of items in {object} in-place.
 		{object} can be a |List| or a |Blob|.
 		Returns {object}.
+		Returns zero if {object} is not a List or a Blob.
 		If you want an object to remain unmodified make a copy first: >
 			:let revlist = reverse(copy(mylist))
 <		Can also be used as a |method|: >
@@ -7189,6 +7210,7 @@ round({expr})							*round()*
 		as a |Float|.  If {expr} lies halfway between two integral
 		values, then use the larger one (away from zero).
 		{expr} must evaluate to a |Float| or a |Number|.
+		Returns 0.0 if {expr} is not a |Float| or a |Number|.
 		Examples: >
 			echo round(0.456)
 <			0.0  >
@@ -7223,6 +7245,7 @@ screenattr({row}, {col})					*screenattr()*
 		Like |screenchar()|, but return the attribute.  This is a rather
 		arbitrary number that can only be used to compare to the
 		attribute at other positions.
+		Returns -1 when row or col is out of range.
 
 		Can also be used as a |method|: >
 			GetRow()->screenattr(col)
@@ -7286,6 +7309,7 @@ screenpos({winid}, {lnum}, {col})				*screenpos()*
 		|conceal| taken into account.
 		If the position is in a closed fold the screen position of the
 		first character is returned, {col} is not used.
+		Returns an empty Dict if {winid} is invalid.
 
 		Can also be used as a |method|: >
 			GetWinid()->screenpos(lnum, col)
@@ -8346,6 +8370,7 @@ simplify({filename})					*simplify()*
 sin({expr})						*sin()*
 		Return the sine of {expr}, measured in radians, as a |Float|.
 		{expr} must evaluate to a |Float| or a |Number|.
+		Returns 0.0 if {expr} is not a |Float| or a |Number|.
 		Examples: >
 			:echo sin(100)
 <			-0.506366 >
@@ -8362,6 +8387,7 @@ sinh({expr})						*sinh()*
 		Return the hyperbolic sine of {expr} as a |Float| in the range
 		[-inf, inf].
 		{expr} must evaluate to a |Float| or a |Number|.
+		Returns 0.0 if {expr} is not a |Float| or a |Number|.
 		Examples: >
 			:echo sinh(0.5)
 <			0.521095 >
@@ -8381,6 +8407,7 @@ slice({expr}, {start} [, {end}])			*slice()*
 		|vim9script|.  Also, composing characters are not counted.
 		When {end} is omitted the slice continues to the last item.
 		When {end} is -1 the last item is omitted.
+		Returns an empty value if {start} or {end} are invalid.
 
 		Can also be used as a |method|: >
 			GetList()->slice(offset)
@@ -8626,7 +8653,8 @@ sqrt({expr})						*sqrt()*
 		Return the non-negative square root of Float {expr} as a
 		|Float|.
 		{expr} must evaluate to a |Float| or a |Number|.  When {expr}
-		is negative the result is NaN (Not a Number).
+		is negative the result is NaN (Not a Number).  Returns 0.0 if
+		{expr} is not a |Float| or a |Number|.
 		Examples: >
 			:echo sqrt(100)
 <			10.0 >
@@ -8707,6 +8735,8 @@ str2float({string} [, {quoted}])				*str2float()*
 		|substitute()|: >
 			let f = str2float(substitute(text, ',', '', 'g'))
 <
+		Returns 0.0 if the conversion fails.
+
 		Can also be used as a |method|: >
 			let f = text->substitute(',', '', 'g')->str2float()
 <
@@ -8746,6 +8776,8 @@ str2nr({string} [, {base} [, {quoted}]])			*str2nr()*
 		{base} is 2 a leading "0b" or "0B" is ignored.
 		Text after the number is silently ignored.
 
+		Returns 0 if {string} is empty or on error.
+
 		Can also be used as a |method|: >
 			GetText()->str2nr()
 
@@ -8756,6 +8788,8 @@ strcharlen({string})					*strcharlen()*
 		|strchars()| can count the number of characters, counting
 		composing characters separately.
 
+		Returns 0 if {string} is empty or on error.
+
 		Also see |strlen()|, |strdisplaywidth()| and |strwidth()|.
 
 		Can also be used as a |method|: >

runtime/doc/index.txt

@@ -1,4 +1,4 @@
-*index.txt*     For Vim version 8.2.  Last change: 2022 Mar 05
+*index.txt*     For Vim version 8.2.  Last change: 2022 Jun 11
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -295,7 +295,7 @@ tag		char	      note action in Normal mode	~
 |/|		/{pattern}<CR>	1  search forward for the Nth occurrence of
 				   {pattern}
 |/<CR>|		/<CR>		1  search forward for {pattern} of last search
-|count|		0		1  cursor to the first char of the line
+|0|		0		1  cursor to the first char of the line
 |count|		1		   prepend to command to give a count
 |count|		2			"
 |count|		3			"

runtime/doc/syntax.txt

@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 8.2.  Last change: 2022 Jun 03
+*syntax.txt*	For Vim version 8.2.  Last change: 2022 Jun 10
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5395,8 +5395,8 @@ StatusLineNC	status lines of not-current windows
 							*hl-StatusLineTerm*
 StatusLineTerm	Status line of current window, if it is a |terminal| window.
 							*hl-StatusLineTermNC*
-StatusLineTermNC   Status lines of not-current windows that is a |terminal|
-		window.
+StatusLineTermNC	Status lines of not-current windows that is a
+			|terminal| window.
 							*hl-TabLine*
 TabLine		Tab pages line, not active tab page label.
 							*hl-TabLineFill*

runtime/doc/todo.txt

@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 8.2.  Last change: 2022 Jun 09
+*todo.txt*      For Vim version 8.2.  Last change: 2022 Jun 12
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -38,6 +38,9 @@ browser use: https://github.com/vim/vim/issues/1234
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
+searchpair() must call function to set timeout, not pass the time limit down
+(and set it many times).  #10562
+
 Prepare for Vim 9.0 release:
 - Update the user manual:
   - Add more to usr_50.txt as an "advanced section" of usr_41.txt

runtime/doc/usr_41.txt

@@ -1,4 +1,4 @@
-*usr_41.txt*	For Vim version 8.2.  Last change: 2022 Jun 04
+*usr_41.txt*	For Vim version 8.2.  Last change: 2022 Jun 10
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -1509,7 +1509,7 @@ functions: >
 	function SetSyn(name) ~
 
 The "<SNR>" prefix means that a function is script-local.  |Vim9| functions
-wil start with "def" and include argument and return types.  Legacy functions
+will start with "def" and include argument and return types.  Legacy functions
 are listed with "function".
 
 To see what a function does, use its name as an argument for `function`: >
@@ -1667,7 +1667,7 @@ Notice that the first item of the List that range() produces is zero, thus the
 last item is one less than the length of the list.  Detail: Internally range()
 does not actually create the list, so that a large range used in a for loop
 works efficiently.  When used elsewhere, the range is turned into an actual
-list, which takes more time for a long ist.
+list, which takes more time for a long list.
 
 You can also specify the maximum value, the stride and even go backwards: >
 

runtime/doc/vim9.txt

@@ -1,4 +1,4 @@
-*vim9.txt*	For Vim version 8.2.  Last change: 2022 May 21
+*vim9.txt*	For Vim version 8.2.  Last change: 2022 Jun 10
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1612,7 +1612,7 @@ and cannot be accessed by the importing script.
 This mechanism exists for writing a script that can be sourced (imported) by
 other scripts, while making sure these other scripts only have access to what
 you want them to.  This also avoids using the global namespace, which has a
-risc of name collisions.  For example when you have two plugins with similar
+risk of name collisions.  For example when you have two plugins with similar
 functionality.
 
 You can cheat by using the global namespace explicitly.  That should be done
@@ -1758,7 +1758,9 @@ used: >
 
 When the mapping is defined "<SID>name." will be replaced with <SNR> and the
 script ID of the imported script.
-
+An even simpler solution is using |<ScriptCmd>|: >
+	noremap ,a <ScriptCmd>name.Function()<CR>
+<
 							*:import-cycle*
 The `import` commands are executed when encountered.  If script A imports
 script B, and B (directly or indirectly) imports A, this will be skipped over.
@@ -2202,7 +2204,7 @@ dictionary.  With some care this can be made to work, but it does not look
 like real classes.  On top of that, it's quite slow, because of the use of
 dictionaries.
 
-It would be good to support real classes, and this is planned for a leter
+It would be good to support real classes, and this is planned for a later
 version.  The support is a "minimal common functionality" of class support in
 most languages.  It will work much like Java, which is the most popular
 programming language.