Github user dbtsai commented on the issue:

    https://github.com/apache/spark/pull/23148
  
    My concern is that let's say we have a code like the following which I 
copied from `ParquetSchemaPruningSuite.scala`; the scalafmt will complaint the 
second line is longer than 98 and reformat it. But this should be a legit 
coding style as many times, we are trying to put the code in one line for 
better readability. 
    
    ```scala
        checkScan(query,
          
"struct<id:int,name:struct<first:string,middle:string,last:string>,address:string,pets:int,"
 +
          "friends:array<struct<first:string,middle:string,last:string>>," +
          
"relatives:map<string,struct<first:string,middle:string,last:string>>>")
    ```


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