Insert parenthesis to get better formatting

[vmgustavo]

While handling fluent interfaces if the instruction is within parenthesis Black formats it this way:

• Original

(spark.read.parquet(path).select(columns).filter('column is not null').filter((f.size('id_list') > 1) & (f.col('operating_system') != 'iOS')))

• Formatted

(
    spark.read.parquet(path)
    .select(columns)
    .filter("column is not null")
    .filter((f.size("id_list") > 1) & (f.col("operating_system") != "iOS"))
)

However if the instruction is not within parenthesis it formats it differently:

• Original

spark.read.parquet(path).select(columns).filter('column is not null').filter((f.size('id_list') > 1) & (f.col('operating_system') != 'iOS'))

• Formatted

spark.read.parquet(path).select(columns).filter("column is not null").filter(
    (f.size("id_list") > 1) & (f.col("operating_system") != "iOS")
)

I believe it would be beneficial to force the use of parenthesis to use the better formatting style instead of the other

[felix-hilden]

Thanks for submitting! This is tracked in #571, so let's continue there.