diff --git a/runtime/doc/editing.txt b/runtime/doc/editing.txt
index 714bc65..4ade4aa 100644
--- a/runtime/doc/editing.txt
+++ b/runtime/doc/editing.txt
@@ -1,4 +1,4 @@
-*editing.txt*   For Vim version 8.0.  Last change: 2017 Aug 21
+*editing.txt*   For Vim version 8.0.  Last change: 2017 Nov 16
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -900,7 +900,7 @@
 
 							*:w* *:write*
 						*E502* *E503* *E504* *E505*
-						*E512* *E514* *E667* *E796*
+						*E512* *E514* *E667* *E796* *E949*
 :w[rite] [++opt]	Write the whole buffer to the current file.  This is
 			the normal way to save changes to a file.  It fails
 			when the 'readonly' option is set or when there is
@@ -956,6 +956,9 @@
 ":w #".  This can be switched off by removing the 'A' flag from the
 'cpoptions' option.
 
+Note that the 'fsync' option matters here.  If it's set it may make writes
+slower (but safer).
+
 							*:sav* *:saveas*
 :sav[eas][!] [++opt] {file}
 			Save the current buffer under the name {file} and set