Made long line highlighting toggleable

.vimrc

@@ -337,5 +337,15 @@ autocmd BufRead,BufNewFile *.feature set sw=4 sts=4 et
 
 " Highlight lines that are too long
 highlight OverLength ctermbg=darkred ctermfg=white guibg=#592929
-match OverLength /\%81v.*/
+function! ToggleLongLines()
+  if (exists("g:highlight_long_lines"))
+    unlet g:highlight_long_lines
+    match OverLength //
+  else
+    let g:highlight_long_lines = 1
+    match OverLength /\%81v.*/
+  endif
+endfunction
+call ToggleLongLines()
+map <silent> <leader>ll :call ToggleLongLines()<cr>