整理代码习惯，常量字符串改用单引号，可能有遗漏

parts/modes/master_beginner.lua

@@ -14,11 +14,11 @@ local function score(P)
 	D.pt=D.pt+s
 
 	if D.pt%100==99 then
-		SFX.play("blip_1")
+		SFX.play('blip_1')
 	elseif D.pt>=D.target then--Level up!
 		s=D.target/100
 		local E=P.gameEnv
-		BG.set(s==1 and"bg1"or s==2 and"bg2"or s==3 and"rainbow"or "rainbow2")
+		BG.set(s==1 and'bg1'or s==2 and'bg2'or s==3 and'rainbow'or 'rainbow2')
 		E.lock=rush_lock[s]
 		E.wait=rush_wait[s]
 		E.fall=rush_fall[s]
@@ -31,12 +31,12 @@ local function score(P)
 
 		if s==5 then
 			D.pt=500
-			P:win("finish")
+			P:win('finish')
 		else
 			D.target=D.target+100
-			P:showTextF(text.stage:gsub("$1",s),0,-120,80,"fly")
+			P:showTextF(text.stage:gsub("$1",s),0,-120,80,'fly')
 		end
-		SFX.play("reach")
+		SFX.play('reach')
 	end
 end
 
@@ -55,7 +55,7 @@ return{
 			P.modeData.target=100
 		end,
 		freshLimit=15,
-		bg="bg1",bgm="secret8th",
+		bg='bg1',bgm='secret8th',
 	},
 	slowMark=true,
 	load=function()
@@ -65,7 +65,7 @@ return{
 		setFont(45)
 		mStr(P.modeData.pt,69,320)
 		mStr(P.modeData.target,69,370)
-		gc.rectangle("fill",25,375,90,4)
+		gc.rectangle('fill',25,375,90,4)
 	end,
 	score=function(P)return{P.modeData.pt,P.stat.time}end,
 	scoreDisp=function(D)return D[1].."P   "..STRING.time(D[2])end,