Fixs alibaba#4927 adjust code style

Author: lulu2panpan

src/main/java/com/alibaba/druid/sql/ast/SQLPartitionByRange.java

@@ -20,12 +20,12 @@
 
 public class SQLPartitionByRange extends SQLPartitionBy {
     protected SQLExpr interval;
-    protected boolean isColumns = false;
+    protected boolean isColumns;
     protected SQLExpr startWith;
     protected SQLIntegerExpr expireAfter;
     protected SQLIntegerExpr preAllocate;
     protected SQLExpr pivotDateExpr;
-    protected boolean disableSchedule = false;
+    protected boolean disableSchedule;
 
     public SQLPartitionByRange() {
     }

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java

@@ -368,7 +368,7 @@ public MySqlCreateTableStatement parseCreateTable(boolean acceptCreate) {
                             if (global) {
                                 unique.setGlobal(true);
                             }
-                            if(local){
+                            if (local) {
                                 unique.setLocal(true);
                             }
                         }