Fix for ${0} problems

autoload/neosnippet/handlers.vim

@@ -74,11 +74,12 @@ function! neosnippet#handlers#_complete_done() "{{{
   if !s:is_auto_pairs()
     if key != '(' && snippet =~ key.'$'
       let snippet .= '${'. cnt .'}'.pair
+      let cnt += 1
     elseif snippet !~ pair.'$'
       let snippet .= pair
     endif
 
-    let snippet .= '${0}'
+    let snippet .= '${' . cnt . '}'
   endif
 
   let [cur_text, col, _] = neosnippet#mappings#_pre_trigger()

autoload/neosnippet/parser.vim

@@ -238,11 +238,6 @@ endfunction"}}}
 
 function! neosnippet#parser#_initialize_snippet(dict, path, line, pattern, name) "{{{
   let a:dict.word = substitute(a:dict.word, '\n\+$', '', '')
-  if a:dict.word !~
-        \ neosnippet#get_placeholder_marker_substitute_pattern()
-    " Add placeholder.
-    let a:dict.word .= '${0}'
-  endif
 
   if !has_key(a:dict, 'abbr') || a:dict.abbr == ''
     " Set default abbr.

doc/neosnippet.txt

@@ -347,10 +347,10 @@ neosnippet#anonymous({snippet})
 		Note: You can use this function with |map-<expr>|.
 >
 		inoremap <silent> ((
-		\ <C-r>=neosnippet#anonymous('\left(${1}\right)${0}')<CR>
+		\ <C-r>=neosnippet#anonymous('\left(${1}\right)${2}')<CR>
 		" OR
 		inoremap <expr><silent> ((
-		\ neosnippet#anonymous('\left(${1}\right)${0}')
+		\ neosnippet#anonymous('\left(${1}\right)${2}')
 <
 						*neosnippet#expand()*
 neosnippet#expand({trigger})
@@ -580,6 +580,8 @@ The structure of a placeholder can be:
 	placeholders in the snippet, it will repeat its content. $1 is
 	synchronized to ${1} and so on. ${0} will be the final jump
 	placeholder.
+	Note: You should not use ${0} for one line snippet.
+	It conflicts with nested snippet feature.
 
 	Example