Update runtime files.

runtime/doc/eval.txt

@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 8.2.  Last change: 2020 Jan 19
+*eval.txt*	For Vim version 8.2.  Last change: 2020 Feb 03
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1808,7 +1808,9 @@ v:errors	Errors found by assert functions, such as |assert_true()|.
 
 					*v:event* *event-variable*
 v:event		Dictionary containing information about the current
-		|autocommand|.  The dictionary is emptied when the |autocommand|
+		|autocommand|.  See the specific event for what it puts in
+		this dictionary.
+		The dictionary is emptied when the |autocommand|
 		finishes, please refer to |dict-identity| for how to get an
 		independent copy of it.
 
@@ -3455,6 +3457,7 @@ chdir({dir})						*chdir()*
 			  directory (|:tcd|) then changes the tabpage local
 			  directory.
 			- Otherwise, changes the global directory.
+		{dir} must be a String.
 		If successful, returns the previous working directory.  Pass
 		this to another chdir() to restore the directory.
 		On failure, returns an empty string.
@@ -5664,7 +5667,7 @@ getwininfo([{winid}])					*getwininfo()*
 			GetWinnr()->getwininfo()
 
 getwinpos([{timeout}])					*getwinpos()*
-		The result is a list with two numbers, the result of
+		The result is a List with two numbers, the result of
 		|getwinposx()| and |getwinposy()| combined:
 			[x-pos, y-pos]
 		{timeout} can be used to specify how long to wait in msec for
@@ -10461,6 +10464,7 @@ winline()	The result is a Number, which is the screen line of the cursor
 							*winnr()*
 winnr([{arg}])	The result is a Number, which is the number of the current
 		window.  The top window has number 1.
+		Returns zero for a popup window.
 
 		The optional argument {arg} supports the following values:
 			$	the number of the last window (the window