[vim]add function to help vim debugging

.vimrc

@@ -433,6 +433,22 @@ if filereadable(expand('~/.vimrc.local'))
   source ~/.vimrc.local
 endif
 
+
+""""""""""
+" Debug
+""""""""""
+
+"Or start vim with -V[VERBOSENUMBER][FILE]
+function! ToggleVerbose()
+    if !&verbose
+        set verbosefile=~/.log/vim/verbose.log
+        set verbose=15
+    else
+        set verbose=0
+        set verbosefile=
+    endif
+endfunction
+
 """""""""
 " Plugin"
 """""""""