Update help files.
diff --git a/runtime/doc/editing.txt b/runtime/doc/editing.txt
index 1d104bc..a1d0e14 100644
--- a/runtime/doc/editing.txt
+++ b/runtime/doc/editing.txt
@@ -1,4 +1,4 @@
-*editing.txt* For Vim version 7.4. Last change: 2016 Jan 03
+*editing.txt* For Vim version 7.4. Last change: 2016 Jan 17
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -639,6 +639,7 @@
:0argadd x x a b c
:1argadd x a x b c
:$argadd x a b c x
+ And after the last one:
:+2argadd y a b c x y
There is no check for duplicates, it is possible to
add a file to the argument list twice.
@@ -1458,6 +1459,16 @@
When writing an undo file, the same key and method will be used for the text
in the undo file. |persistent-undo|.
+To test for blowfish support you can use these conditions: >
+ has('crypt-blowfish')
+ has('crypt-blowfish2')
+This works since Vim 7.4.1099 while blowfish support was added earlier.
+Thus the condition failing doesn't mean blowfish is not supported. You can
+test for blowfish with: >
+ v:version >= 703
+And for blowfish2 with: >
+ v:version > 704 || (v:version == 704 && has('patch401'))
+<
*E817* *E818* *E819* *E820*
When encryption does not work properly, you would be able to write your text
to a file and never be able to read it back. Therefore a test is performed to