--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 8.1.  Last change: 2019 Aug 08
+*eval.txt*	For Vim version 8.1.  Last change: 2019 Aug 17
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -483,7 +483,7 @@ String automatically.  Thus the String '
 entry.  Note that the String '04' and the Number 04 are different, since the
 Number will be converted to the String '4'.  The empty string can also be used
 as a key.
-						*literal-Dict*
+						*literal-Dict* *#{}*
 To avoid having to put quotes around every key the #{} form can be used.  This
 does require the key to consist only of ASCII letters, digits, '-' and '_'.
 Example: >
@@ -1219,7 +1219,7 @@ When expr8 is a |Funcref| type variable,
 
 expr8->name([args])	method call			*method* *->*
 expr8->{lambda}([args])
-
+							*E276*
 For methods that are also available as global functions this is the same as: >
 	name(expr8 [, args])
 There can also be methods specifically for the type of "expr8".
@@ -1230,7 +1230,7 @@ next method: >
 <
 Example of using a lambda: >
 	GetPercentage->{x -> x * 100}()->printf('%d%%')
-
+<
 							*E274*
 "->name(" must not contain white space.  There can be white space before the
 "->" and after the "(", thus you can split the lines like this: >
@@ -1239,7 +1239,10 @@ Example of using a lambda: >
 	\ ->map(mapexpr)
 	\ ->sort()
 	\ ->join()
-<
+
+When using the lambda form there must be no white space between the } and the
+(.
+
 
 							*expr9*
 number
@@ -2035,14 +2038,19 @@ v:progname	Contains the name (with path 
 		Read-only.
 
 					*v:progpath* *progpath-variable*
-v:progpath	Contains the command with which Vim was invoked, including the
-		path.  Useful if you want to message a Vim server using a
+v:progpath	Contains the command with which Vim was invoked, in a form
+		that when passed to the shell will run the same Vim executable
+		as the current one (if $PATH remains unchanged).
+		Useful if you want to message a Vim server using a
 		|--remote-expr|.
 		To get the full path use: >
 			echo exepath(v:progpath)
-<		If the path is relative it will be expanded to the full path,
-		so that it still works after `:cd`. Thus starting "./vim"
-		results in "/home/user/path/to/vim/src/vim".
+<		If the command has a relative path it will be expanded to the
+		full path, so that it still works after `:cd`. Thus starting
+		"./vim" results in "/home/user/path/to/vim/src/vim".
+		On Linux and other systems it will always be the full path.
+		On Mac it may just be "vim" and using exepath() as mentioned
+		above should be used to get the full path.
 		On MS-Windows the executable may be called "vim.exe", but the
 		".exe" is not added to v:progpath.
 		Read-only.
@@ -9320,6 +9328,7 @@ win_execute({id}, {command} [, {silent}]
 		autocommands and not actually show syntax highlighting.
 							*E994*
 		Not all commands are allowed in popup windows.
+		When window {id} does not exist then no error is given.
 
 win_findbuf({bufnr})					*win_findbuf()*
 		Returns a list with |window-ID|s for windows that contain
@@ -10341,6 +10350,12 @@ 7. Commands						*expression-commands*
 :let ${env-name} = {expr1}			*:let-environment* *:let-$*
 			Set environment variable {env-name} to the result of
 			the expression {expr1}.  The type is always String.
+
+			On some systems making an environment variable empty
+			causes it to be deleted.  Many systems do not make a
+			difference between an environment variable that is not
+			set and an environment variable that is empty.
+
 :let ${env-name} .= {expr1}
 			Append {expr1} to the environment variable {env-name}.
 			If the environment variable didn't exist yet this