fix buf

hutool-core/src/test/java/cn/hutool/core/util/ReUtilTest.java

@@ -142,6 +142,14 @@ public class ReUtilTest {
 		Assert.assertEquals("我有个\\$符号\\{\\}", escape);
 	}
 
+	@Test
+	public void escapeTest2(){
+		String str = "a[bbbc";
+		String re = "[";
+		final String s = ReUtil.get(ReUtil.escape(re), str, 0);
+		Assert.assertEquals("[", s);
+	}
+
 	@Test
 	public void getAllGroupsTest() {
 		//转义给定字符串，为正则相关的特殊符号转义