Simplify some wincmd calls

autoload/tagbar.vim

@@ -821,11 +821,11 @@ function! s:RestoreSession()
     call s:InitWindow(g:tagbar_autoclose)
 
     " Leave the Tagbar window and come back so the update event gets triggered
-    execute 'wincmd p'
+    wincmd p
     execute tagbarwinnr . 'wincmd w'
 
     if !in_tagbar
-        execute 'wincmd p'
+        wincmd p
     endif
 endfunction
 
@@ -1398,7 +1398,7 @@ function! s:OpenWindow(autoclose)
 
     call s:InitWindow(a:autoclose)
 
-    execute 'wincmd p'
+    wincmd p
 
     " Jump back to the tagbar window if autoclose or autofocus is set. Can't
     " just stay in it since it wouldn't trigger the update event
@@ -2315,7 +2315,7 @@ function! s:JumpToTag(stay_in_tagbar)
     " This elaborate construct will try to switch to the correct
     " buffer/window; if the buffer isn't currently shown in a window it will
     " open it in the first window with a non-special buffer in it
-    execute 'wincmd p'
+    wincmd p
     let filebufnr = bufnr(taginfo.fileinfo.fpath)
     if bufnr('%') != filebufnr
         let filewinnr = bufwinnr(filebufnr)
@@ -2333,7 +2333,7 @@ function! s:JumpToTag(stay_in_tagbar)
         " To make ctrl-w_p work we switch between the Tagbar window and the
         " correct window once
         execute tagbarwinnr . 'wincmd w'
-        execute 'wincmd p'
+        wincmd p
     endif
 
     " Mark current position so it can be jumped back to