Remove o from formatoptions and fix vmap P

vimrc

@@ -18,6 +18,7 @@ set modeline
 set keywordprg=man\ -s
 set mouse=
 set linebreak
+set formatoptions-=o
 set t_Co=256
 
 set tags=tags;
@@ -34,7 +35,7 @@ map - $
 map <C-n> gt
 map <C-p> gT
 map <C-h> :AS<CR>
-vmap P "_dp
+vmap P "_dP
 
 filetype plugin indent on
 syntax on