Fix missing items in completion

FIX: This commit fix dbeniamine/todo.txt-vim#7 some the last completion item
was not added to the completion list
CHG: This commit also provide a small refactor of todo#Complete

autoload/todo.vim

@@ -277,7 +277,7 @@ endfunction
 " Completion {{{1
 
 " Simple keyword completion on all buffers {{{2
-function! TodoKeywordComplete(base)
+function! TodoKeywordComplete(base)
     " Search for matches
     let res = []
     for bufnr in range(1,bufnr('$'))
@@ -293,6 +293,25 @@ function! TodoKeywordComplete(base)
     endfor
     return res
 endfunction
+
+" Convert an item to the completion format and add it to the completion list
+fun! TodoAddToCompletionList(list,item,opp)
+    " Create the definitive item
+    let resitem={}
+    let resitem.word=a:item.word
+    let resitem.info=a:opp=='+'?"Projects":"Contexts"
+    let resitem.info.=": ".join(a:item.related, ", ")
+                \."\nBuffers: ".join(a:item.buffers, ", ")
+    call add(a:list,resitem)
+endfun
+
+fun! TodoCopyTempItem(item)
+    let ret={}
+    let ret.word=a:item.word
+    let ret.related=[a:item.related]
+    let ret.buffers=[a:item.buffers]
+    return ret
+endfun
 
 " Intelligent completion for projects and Contexts {{{2
 fun! todo#Complete(findstart, base)
@@ -327,10 +346,7 @@ fun! todo#Complete(findstart, base)
         call sort(res)
         " Here all results are sorted in res, but we need to merge them
         let ret=[]
-        if res != []
-            let curitem={}
-            let curitem.word=res[0].word
-            let curitem.related=[]
+        if res != []
             let curitem=TodoCopyTempItem(res[0])
             for it in res
                 if curitem.word==it.word
@@ -341,19 +357,14 @@ fun! todo#Complete(findstart, base)
                     if index(curitem.buffers,it.buffers) <0
                         call add(curitem.buffers,it.buffers)
                     endif
-                else
-                    " Create the definitive item
-                    let resitem={}
-                    let resitem.word=curitem.word
-                    let resitem.info=opp=='+'?"Projects":"Contexts"
-                    let resitem.info.=": ".join(curitem.related, ", ")
-                                \."\nBuffers: ".join(curitem.buffers, ", ")
+                else
+                    " Add to list
                     call TodoAddToCompletionList(ret,curitem,opp)
-                    " Init new item from it
-                    let curitem.word=it.word
-                    let curitem.related=[it.related]
+                    " Init new item from it
                     let curitem=TodoCopyTempItem(it)
                 endif
+            endfor
+            " Don't forget to add the list item
             call TodoAddToCompletionList(ret,curitem,opp)
         endif
         return ret