fix zeroturnaround#123, add hex string type

Author: inferrinizzard

src/core/regexFactory.ts

@@ -50,6 +50,7 @@ const patterns = {
 	'""': '(("[^"\\\\]*(?:\\\\.[^"\\\\]*)*("|$))+)',
 	"''": "(('[^'\\\\]*(?:\\\\.[^'\\\\]*)*('|$))+)",
 	"N''": "((N'[^'\\\\]*(?:\\\\.[^'\\\\]*)*('|$))+)",
+	"x''": "((x'[^'\\\\]*(?:\\\\.[^'\\\\]*)*('|$))+)",
 	"U&''": "((U&'[^'\\\\]*(?:\\\\.[^'\\\\]*)*('|$))+)",
 	'U&""': '((U&"[^"\\\\]*(?:\\\\.[^"\\\\]*)*("|$))+)',
 	'$$': '((?<tag>\\$\\w*\\$)[\\s\\S]*?(?:\\k<tag>|$))',

src/languages/Db2Formatter.ts

@@ -866,7 +866,7 @@ export default class Db2Formatter extends Formatter {
 		...Object.values(reservedKeywords).reduce((acc, arr) => [...acc, ...arr], []),
 	];
 
-	static stringTypes: StringPatternType[] = [`""`, "''", '``', '[]'];
+	static stringTypes: StringPatternType[] = [`""`, "''", '``', '[]', "x''"];
 	static blockStart = ['('];
 	static blockEnd = [')'];
 	static indexedPlaceholderTypes = ['?'];