Spark-19726: fix scala style checks error

Author: YIHAODIAN\wangshuangshuang

sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala

@@ -273,7 +273,8 @@ object JdbcUtils extends Logging {
     val rsmd = resultSet.getMetaData
     val ncols = rsmd.getColumnCount
     val fields = new Array[StructField](ncols)
-    // if true, spark will propagate null to underlying DB engine instead of using type default value
+    // if true, spark will propagate null to underlying
+    // DB engine instead of using type default value
     val alwaysNullable = true
 
     var i = 0
@@ -293,7 +294,11 @@ object JdbcUtils extends Logging {
             rsmd.getClass.getName == "org.apache.hive.jdbc.HiveResultSetMetaData" => true
         }
       }
-      val nullable = if (alwaysNullable) alwaysNullable else rsmd.isNullable(i + 1) != ResultSetMetaData.columnNoNulls
+      val nullable =
+        if (alwaysNullable)
+          alwaysNullable
+        else
+          rsmd.isNullable(i + 1) != ResultSetMetaData.columnNoNulls
       val metadata = new MetadataBuilder()
         .putString("name", columnName)
         .putLong("scale", fieldScale)