reduced sorting priority for postfix completion

Author: sumneko

changelog.md

@@ -1,6 +1,7 @@
 # changelog
 
 ## 2.6.4
+* `CHG` completion: reduced sorting priority for postfix completion
 * `FIX` [#937](https://github.com/sumneko/lua-language-server/issues/937)
 * `FIX` [#941](https://github.com/sumneko/lua-language-server/issues/941)
 

script/core/completion/postfix.lua

@@ -240,7 +240,7 @@ local function checkPostFix(state, word, wordPosition, position, symbol, results
     if not source then
         return
     end
-    for _, action in ipairs(actions) do
+    for i, action in ipairs(actions) do
         if matchKey(word, action.key) then
             action.data[1](state, source, function (newText)
                 results[#results+1] = {
@@ -261,6 +261,7 @@ local function checkPostFix(state, word, wordPosition, position, symbol, results
                             newText = '',
                         },
                     },
+                    sortText = ('postfix-%04d'):format(i),
                 }
             end)
         end

script/provider/provider.lua

@@ -535,7 +535,7 @@ m.register 'textDocument/completion' {
                 kind             = res.kind,
                 detail           = res.detail,
                 deprecated       = res.deprecated,
-                sortText         = ('%04d'):format(i),
+                sortText         = res.sortText or ('%04d'):format(i),
                 filterText       = res.filterText,
                 insertText       = res.insertText,
                 insertTextFormat = 2,