fix lua lints

rootfs/etc/nginx/lua/balancer/ewma.lua

@@ -78,15 +78,15 @@ end
 
 function _M.balance(self)
   local peers = self.peers
-  local endpoint, score = peers[1], -1
+  local endpoint, ewma_score = peers[1], -1
 
   if #peers > 1 then
     local k = (#peers < PICK_SET_SIZE) and #peers or PICK_SET_SIZE
     local peer_copy = util.deepcopy(peers)
-    endpoint, score = pick_and_score(self, peer_copy, k)
+    endpoint, ewma_score = pick_and_score(self, peer_copy, k)
   end
 
-  ngx.var.balancer_ewma_score = score
+  ngx.var.balancer_ewma_score = ewma_score
 
   -- TODO(elvinefendi) move this processing to _M.sync
   return endpoint.address .. ":" .. endpoint.port

rootfs/etc/nginx/lua/balancer/sticky.lua

@@ -132,13 +132,16 @@ function _M.balance(self)
   end
 
   local last_failure = self.get_last_failure()
-  local should_pick_new_upstream = last_failure ~= nil and self.cookie_session_affinity.change_on_failure or upstream_from_cookie == nil
+  local should_pick_new_upstream = last_failure ~= nil and self.cookie_session_affinity.change_on_failure or
+    upstream_from_cookie == nil
 
   if not should_pick_new_upstream then
     return upstream_from_cookie
   end
 
-  local new_upstream, key = pick_new_upstream(self)
+  local new_upstream
+
+  new_upstream, key = pick_new_upstream(self)
   if not new_upstream then
     ngx.log(ngx.WARN, string.format("failed to get new upstream; using upstream %s", new_upstream))
   elseif should_set_cookie(self) then