updated for version 7.4.191

Problem:    Escaping a file name for shell commands can't be done without a
            function.
Solution:   Add the :S file name modifier.

runtime/doc/eval.txt

@@ -5428,6 +5428,7 @@ shellescape({string} [, {special}])			*shellescape()*
 <		This results in a directory listing for the file under the
 		cursor.  Example of use with |system()|: >
 		    :call system("chmod +w -- " . shellescape(expand("%")))
+<		See also |::S|.
 
 
 shiftwidth()						*shiftwidth()*
@@ -5910,14 +5911,16 @@ system({expr} [, {input}])				*system()* *E677*
 		passed as stdin to the command.  The string is written as-is,
 		you need to take care of using the correct line separators
 		yourself.  Pipes are not used.
-		Note: Use |shellescape()| to escape special characters in a
-		command argument.  Newlines in {expr} may cause the command to
-		fail.  The characters in 'shellquote' and 'shellxquote' may
-		also cause trouble.
+		Note: Use |shellescape()| or |::S| with |expand()| or 
+		|fnamemodify()| to escape special characters in a command 
+		argument.  Newlines in {expr} may cause the command to fail.  
+		The characters in 'shellquote' and 'shellxquote' may also 
+		cause trouble.
 		This is not to be used for interactive commands.
 
 		The result is a String.  Example: >
 		    :let files = system("ls " .  shellescape(expand('%:h')))
+		    :let files = system('ls ' . expand('%:h:S'))
 
 <		To make the result more system-independent, the shell output
 		is filtered to replace <CR> with <NL> for Macintosh, and