reformat 代码，保持阿里编码规范

Author: yikangfeng01

sentinel-core/src/main/java/com/alibaba/csp/sentinel/log/CspFormatter.java

@@ -1,17 +1,14 @@
 /*
  * Copyright 1999-2018 Alibaba Group Holding Ltd.
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
  */
 package com.alibaba.csp.sentinel.log;
 
@@ -28,33 +25,33 @@
  */
 class CspFormatter extends Formatter {
 
-	private final ThreadLocal<SimpleDateFormat> dateFormatThreadLocal = new ThreadLocal<SimpleDateFormat>() {
-		@Override
-		public SimpleDateFormat initialValue() {
-			return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
-		}
-	};
+    private final ThreadLocal<SimpleDateFormat> dateFormatThreadLocal = new ThreadLocal<SimpleDateFormat>() {
+        @Override
+        public SimpleDateFormat initialValue() {
+            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        }
+    };
 
-	@Override
-	public String format(LogRecord record) {
-		final DateFormat df = dateFormatThreadLocal.get();
-		StringBuilder builder = new StringBuilder(1000);
-		builder.append(df.format(new Date(record.getMillis()))).append(" ");
-		builder.append(formatMessage(record));
+    @Override
+    public String format(LogRecord record) {
+        final DateFormat df = dateFormatThreadLocal.get();
+        StringBuilder builder = new StringBuilder(1000);
+        builder.append(df.format(new Date(record.getMillis()))).append(" ");
+        builder.append(formatMessage(record));
 
-		String throwable = "";
-		if (record.getThrown() != null) {
-			StringWriter sw = new StringWriter();
-			PrintWriter pw = new PrintWriter(sw);
-			pw.println();
-			record.getThrown().printStackTrace(pw);
-			pw.close();
-			throwable = sw.toString();
-		}
-		builder.append(throwable);
-		if ("".equals(throwable)) {
-			builder.append("\n");
-		}
-		return builder.toString();
-	}
+        String throwable = "";
+        if (record.getThrown() != null) {
+            StringWriter sw = new StringWriter();
+            PrintWriter pw = new PrintWriter(sw);
+            pw.println();
+            record.getThrown().printStackTrace(pw);
+            pw.close();
+            throwable = sw.toString();
+        }
+        builder.append(throwable);
+        if ("".equals(throwable)) {
+            builder.append("\n");
+        }
+        return builder.toString();
+    }
 }