update defaults.vim

- Add "!" flag to guioptions on MS-Windows
- remove "i" flag from 'complete'

runtime/defaults.vim

@@ -60,11 +60,20 @@ endif
 " confusing.
 set nrformats-=octal
 
-" For Win32 GUI: remove 't' flag from 'guioptions': no tearoff menu entries.
+" For Win32 GUI:
+" remove 't' flag from 'guioptions': no tearoff menu entries.
+" add '!' flag to guioptions so external commands are run in a terminal
 if has('win32')
   set guioptions-=t
+  if has("terminal")
+    set guioptions+=!
+  endif
 endif
 
+" do not include 'i' in complete option, it may slow down Vim because it
+" has to scan all included files
+set complete-=i
+
 " Don't use Q for Ex mode, use it for formatting.  Except for Select mode.
 " Revert with ":unmap Q".
 map Q gq

runtime/doc/options.txt

@@ -2042,7 +2042,8 @@ A jump table for the options with a short description can be found at |Q_op|.
 	'writebackup'	+ on or off	depends on the |+writebackup| feature
 
 						*'complete'* *'cpt'* *E535*
-'complete' 'cpt'	string	(default: ".,w,b,u,t,i")
+'complete' 'cpt'	string	(default: ".,w,b,u,t,i"
+					  "i" removed in |defaults.vim|)
 			local to buffer
 	This option specifies how keyword completion |ins-completion| works
 	when CTRL-P or CTRL-N are used.  It is also used for whole-line
@@ -4025,7 +4026,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 
 						*'guioptions'* *'go'*
 'guioptions' 'go'	string	(default "egmrLtT"   (MS-Windows,
-					   "t" is removed in |defaults.vim|),
+					 "egimrLT!" in |defaults.vim|),
 					 "aegimrLtT" (GTK and Motif),
 					 )
 			global