[vim] Stabilize cursor while saving and scrolling

vimrc

@@ -120,6 +120,8 @@ set equalalways
 
 " Show a few lines of context around the cursor.
 set scrolloff=5
+" Try to keep the cursor in the same column while scrolling
+set nostartofline
 
 set autochdir
 set autoread
@@ -221,10 +223,10 @@ function! DeleteTrailingTWS()
     if &ft =~ 'diff'
         return
     end
-    normal mb
+    let l:view = winsaveview()
     silent %s/[ \t]*$//g
     silent %s/\s\+$//ge
-    normal 'b
+    call winrestview(l:view)
 endfunction
 "[Make the scripts executable]"
 function! ChangeScriptMode()