整理代码习惯，常量字符串改用单引号，可能有遗漏

parts/player/getSeqGen.lua

@@ -141,17 +141,17 @@ local seqGens={
 }
 return function(P)--Return a piece-generating funtion for player P
 	local s=P.gameEnv.sequence
-	if type(s)=="function"then
+	if type(s)=='function'then
 		return s
-	elseif type(s)=="string"and seqGens[s]then
+	elseif type(s)=='string'and seqGens[s]then
 		return seqGens[s]
 	else
 		LOG.print(
-			type(s)=="string"and
+			type(s)=='string'and
 			"No sequence mode called "..s or
 			"Wrong sequence generator",
-		"warn")
-		P.gameEnv.sequence="bag"
+		'warn')
+		P.gameEnv.sequence='bag'
 		return seqGens.bag
 	end
 end