Fixed ConvertDelimiterToSeparator

- We now aggressively add separators to a line even if it does not have
  the g:table_mode_delimiter. If the user calls Tableize, we should
  trust the user he wishes to tableize everything. Earlier
  implementation skips & fails for lines in text that did not have the
  g:table_mode_delimiter and hence formed inconsistent tables.

  Everything can be undone with a single 'u' anyways.

plugin/table-mode.vim

@@ -109,7 +109,7 @@ function! s:IsTableModeActive()
 endfunction
 
 function! s:ConvertDelimiterToSeparator(line)
-  if getline(a:line) =~# g:table_mode_delimiter
+  if a:line
     execute 'silent! ' . a:line . 's/^\|' . g:table_mode_delimiter . '\|$/' . g:table_mode_separator . '/ge'
   endif
 endfunction