Update runtime files.
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