cmdline.txt: Update Vim 8.2.4812

Author: tsuyoshicho

en/cmdline.txt

@@ -1,4 +1,4 @@
-*cmdline.txt*   For Vim version 8.2.  Last change: 2022 Feb 04
+*cmdline.txt*   For Vim version 8.2.  Last change: 2022 Apr 09
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -939,7 +939,7 @@ Note: these are typed literally, they are not special keys!
 		   file name of the sourced file.  *E498*
 		   When executing a legacy function, is replaced with the call
 		   stack, as with <stack> (this is for backwards
-		   compatibility, using <stack> is preferred).
+		   compatibility, using <stack> or <script> is preferred).
 		   In Vim9 script using <sfile> in a function gives error
 		   *E1245* .
 		   Note that filename-modifiers are useless when <sfile> is
@@ -951,6 +951,12 @@ Note: these are typed literally, they are not special keys!
 		   ".." in between items.  E.g.:
 		   "function {function-name1}[{lnum}]..{function-name2}[{lnum}]"
 		   If there is no call stack you get error *E489* .
+							*:<script>* *<script>*
+	<script>   When executing a `:source` command, is replaced with the file
+		   name of the sourced file.  When executing a function, is
+		   replaced with the file name of the script where it is
+		   defined.
+		   If the file name cannot be determined you get error *E1274* .
 							*:<slnum>* *<slnum>*
 	<slnum>	   When executing a ":source" command, is replaced with the
 		   line number.  *E842*