doc: Update documentation

runtime/doc/eval.txt

@@ -4723,23 +4723,26 @@ input({opts})
 		"-complete=" argument.	Refer to |:command-completion| for
 		more information.  Example: >
 			let fname = input("File: ", "", "file")
-<
+<							*E5400* *E5402*
 		The optional highlight key allows specifying function which 
 		will be used for highlighting user input.  This function 
 		receives user input as its only argument and must return 
-		a list of 3-tuples [hl_start_byte, hl_end_byte + 1, hl_group] 
+		a list of 3-tuples [hl_start_col, hl_end_col + 1, hl_group] 
 		where
-			hl_start_byte is the first highlighted byte,
+			hl_start_col is the first highlighted column,
-			hl_end_byte is the last highlighted byte (+ 1!),
+			hl_end_col is the last highlighted column (+ 1!),
 			hl_group is |:hl| group used for highlighting.
 					      *E5403* *E5404* *E5405* *E5406*
-		Both hl_start_byte and hl_end_byte + 1 must point to the start 
+		Both hl_start_col and hl_end_col + 1 must point to the start 
 		of the multibyte character (highlighting must not break 
-		multibyte characters), hl_end_byte + 1 may be equal to the 
+		multibyte characters), hl_end_col + 1 may be equal to the 
 		input length.  Start column must be in range [0, len(input)), 
-		end column must be in range (hl_start_byte, len(input)], 
+		end column must be in range (hl_start_col, len(input)], 
-		sections must be ordered so that next hl_start_byte is greater 
+		sections must be ordered so that next hl_start_col is greater 
-		then or equal to previous hl_end_byte.
+		then or equal to previous hl_end_col.
+
+		Currently coloring is disabled when command-line contains 
+		arabic characters.
 
 		NOTE: This function must not be used in a startup file, for
 		the versions that only run in GUI mode (e.g., the Win32 GUI).

runtime/doc/vim_diff.txt

@@ -126,7 +126,6 @@ Commands:
 Functions:
   |dictwatcheradd()| notifies a callback whenever a |Dict| is modified
   |dictwatcherdel()|
-  |execute()| works with |:redir|
   |msgpackdump()|, |msgpackparse()| provide msgpack de/serialization
 
 Events:
@@ -143,6 +142,15 @@ Highlight groups:
   |hl-TermCursorNC|
   |hl-Whitespace| highlights 'listchars' whitespace
 
+UI:
+		*E5408* *E5409* *g:Nvim_color_expr* *g:Nvim_color_cmdline*
+  UI now supports command-line coloring. Officially only |input()| and 
+  |inputdialog()| may be colored, temporary for testing purposes expressions 
+  (e.g. |i_CTRL-R_=|) and regular command-line (|:|) are colored by callbacks 
+  defined in `g:Nvim_color_expr` and `g:Nvim_color_cmdline` respectively. 
+  Callbacks are to be replaced by parser implemented in C which will also do 
+  the coloring.
+
 ==============================================================================
 4. Changed features					 *nvim-features-changed*
 
@@ -261,6 +269,8 @@ Lua interface (|if_lua.txt|):
 on cancel and completion respectively) via dictionary argument (replaces all 
 other arguments if used).
 
+|input()| and |inputdialog()| now support user-defined cmdline highlighting.
+
 ==============================================================================
 5. Missing legacy features				 *nvim-features-missing*