Parity in String representation of Column

from pyspark.sql import functions

funs = [
    (functions.acosh, "ACOSH"),
    (functions.asinh, "ASINH"),
    (functions.atanh, "ATANH"),
]

cols = ["a", functions.col("a")]

for f, alias in funs:
    for c in cols:
        self.assertIn(f"{alias}(a)", repr(f(c)))

 Traceback (most recent call last):
  File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/tests/test_functions.py", line 271, in test_inverse_trig_functions
    self.assertIn(f"{alias}(a)", repr(f(c)))
AssertionError: 'ACOSH(a)' not found in "Column<'acosh(ColumnReference(a))'>"

from pyspark.sql.functions import col, lit, overlay
from itertools import chain
import re

actual = list(
    chain.from_iterable(
        [
            re.findall("(overlay\\(.*\\))", str(x))
            for x in [
                overlay(col("foo"), col("bar"), 1),
                overlay("x", "y", 3),
                overlay(col("x"), col("y"), 1, 3),
                overlay("x", "y", 2, 5),
                overlay("x", "y", lit(11)),
                overlay("x", "y", lit(2), lit(5)),
            ]
        ]
    )
)

expected = [
    "overlay(foo, bar, 1, -1)",
    "overlay(x, y, 3, -1)",
    "overlay(x, y, 1, 3)",
    "overlay(x, y, 2, 5)",
    "overlay(x, y, 11, -1)",
    "overlay(x, y, 2, 5)",
]

self.assertListEqual(actual, expected)

df = self.spark.createDataFrame([("SPARK_SQL", "CORE", 7, 0)], ("x", "y", "pos", "len"))

exp = [Row(ol="SPARK_CORESQL")]
self.assertTrue(
    all(
        [
            df.select(overlay(df.x, df.y, 7, 0).alias("ol")).collect() == exp,
            df.select(overlay(df.x, df.y, lit(7), lit(0)).alias("ol")).collect() == exp,
            df.select(overlay("x", "y", "pos", "len").alias("ol")).collect() == exp,
        ]
    )
) 

    Traceback (most recent call last):
  File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/tests/test_functions.py", line 675, in test_overlay
    self.assertListEqual(actual, expected)
AssertionError: Lists differ: ['overlay(ColumnReference(foo), ColumnReference(bar[402 chars]5))'] != ['overlay(foo, bar, 1, -1)', 'overlay(x, y, 3, -1)'[90 chars] 5)']

First differing element 0:
'overlay(ColumnReference(foo), ColumnReference(bar), Literal(1), Literal(-1))'
'overlay(foo, bar, 1, -1)'

- ['overlay(ColumnReference(foo), ColumnReference(bar), Literal(1), Literal(-1))',
-  'overlay(ColumnReference(x), ColumnReference(y), Literal(3), Literal(-1))',
-  'overlay(ColumnReference(x), ColumnReference(y), Literal(1), Literal(3))',
-  'overlay(ColumnReference(x), ColumnReference(y), Literal(2), Literal(5))',
-  'overlay(ColumnReference(x), ColumnReference(y), Literal(11), Literal(-1))',
-  'overlay(ColumnReference(x), ColumnReference(y), Literal(2), Literal(5))']
+ ['overlay(foo, bar, 1, -1)',
+  'overlay(x, y, 3, -1)',
+  'overlay(x, y, 1, 3)',
+  'overlay(x, y, 2, 5)',
+  'overlay(x, y, 11, -1)',
+  'overlay(x, y, 2, 5)']