Better handling of multi buffer completion

CHG: Recognise done.txt format for project and context completion
ADD: Show buffer name in which the project/context exists

ftplugin/todo.vim

@@ -251,7 +251,7 @@ fun! TodoComplete(findstart, base)
         let res = []
         for bufnr in range(1,bufnr('$'))
             let lines=getbufline(bufnr,1,"$")
-            for line in lines
+            for line in lines
                 if line =~ "[x\s0-9\-]*([a-Z]).* ".a:base
                     let item={}
                     let item.word=substitute(line,'.*\('.a:base.'\S*\).*','\1',"")
@@ -265,6 +265,7 @@ fun! TodoComplete(findstart, base)
                             endif
                         endfor
                         let item.info="Projects: ".join(uniq(l:pr), " ")
+                    endif
                     let item.info.="\nBuffer: ".bufname(bufnr)
                     call add(res,item)
                 endif