spring-security/etc/checkstyle/header.txt

^\Q/*\E$
^\Q * Copyright \E(\d{4}-present the original author or authors.|\d{4}(, \d{4})* Acegi Technology Pty Limited)$
^\Q *\E$
^\Q * Licensed under the Apache License, Version 2.0 (the "License");\E$
^\Q * you may not use this file except in compliance with the License.\E$
^\Q * You may obtain a copy of the License at\E$
^\Q *\E$
^\Q *      https://www.apache.org/licenses/LICENSE-2.0\E$
^\Q *\E$
^\Q * Unless required by applicable law or agreed to in writing, software\E$
^\Q * distributed under the License is distributed on an "AS IS" BASIS,\E$
^\Q * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\E$
^\Q * See the License for the specific language governing permissions and\E$
^\Q * limitations under the License.\E$
^\Q */\E$
^$