Fix: Indentation broken within lists (Issue #991)

Side effect, formatoption+=c in order to also keep the joining behavior
with lists

ftplugin/vimwiki.vim

@@ -144,20 +144,25 @@ for bullet in vimwiki#vars#get_syntaxlocal('bullet_types')
   " task list
   for point in vimwiki#vars#get_wikilocal('listsyms_list')
         \ + [vimwiki#vars#get_wikilocal('listsym_rejected')]
-    let comments .= ',b:' . bullet . ' [' . point . ']'
+    let comments .= ',fb:' . bullet . ' [' . point . ']'
   endfor
   " list
-  let comments .= ',b:' . bullet
+  let comments .= ',fb:' . bullet
 endfor
 let &l:comments = comments
 
 " Set format options (:h fo-table)
 " Disable autocomment because, vimwiki does it better
-setlocal formatoptions-=c
 setlocal formatoptions-=r
 setlocal formatoptions-=o
 setlocal formatoptions-=2
+" Autowrap with leading comment
+setlocal formatoptions+=c
+" Do not wrap if line was already long
+setlocal formatoptions+=l
+" AutoWrap inteligent with lists
 setlocal formatoptions+=n
+let &formatlistpat = vimwiki#vars#get_wikilocal('rxListItem')
 " Used to join 'commented' lines (blockquote, list) (see: #915)
 if v:version > 703
   setlocal formatoptions+=j
@@ -167,9 +172,6 @@ endif
 let &l:commentstring = vimwiki#vars#get_wikilocal('commentstring')
 
 
-let &formatlistpat = vimwiki#vars#get_wikilocal('rxListItem')
-
-
 " ------------------------------------------------
 " Folding stuff
 " ------------------------------------------------

test/list_return.vader

@@ -4,6 +4,50 @@
 #       better read this file with `set list`
 
 
+Given vimwiki (List will hard wrap (Issue #991):
+  - one two three four five six seven
+
+Execute (Change textwith):
+  let textwidth = &textwidth
+  let linebreak = &linebreak
+  Log 'Textwidth, Linebreak was: ' . textwidth . ', ' . linebreak
+  set textwidth=40
+  set linebreak
+
+Do (Insert more than tw and press return):
+  A indented line 1
+  \<Cr>
+  indented line 2
+
+Expect (Indentation after autowrap and <CR>):
+  - one two three four five six seven
+    indented line 1
+    indented line 2
+
+Do (o new item):
+  A indented line 1
+  \<Esc>o
+  new item
+
+Expect (New item created):
+  - one two three four five six seven
+    indented line 1
+  - new item
+
+Do (VimwikiReturn 3 5):
+  A indented line 1\<Esc>
+  :VimwikiReturn 3 5\<Cr>
+  new item
+
+Expect (New item created):
+  - one two three four five six seven
+    indented line 1
+  - new item
+
+Execute (Restore textwith):
+  let &textwidth = textwidth
+  let &linebreak = linebreak
+
 Given vimwiki (List with hard wraps):
   - Item 1
   - Item 2