Strings with commas and >= 64 character length breaks quoting with write_csv

[miXwui]

What language are you using?

Tested on both Python and Node.js

Have you tried latest version of polars?

Yes

What version of polars are you using?

Python: 0.13.25
Node.js: 0.4.1

What operating system are you using polars on?

Fedora 36 Beta/Linux

What language version are you using

Python 3.10.4
Node v16.13.1

Describe your bug.

Any string that is >= 64 characters and also contains a comma , will break proper quoting with write_csv.

What are the steps to reproduce the behavior?

import polars as pl

# >= 64 character string with comma breaks
df_64_char = pl.DataFrame(
{
    "col1": ["foo"],
    "col2": ["bar,123456789012345678901234567890123456789012345678901234567890"],
  }
)

df_64_char.write_csv("broken_64_output.csv")

What is the actual behavior?

col1,col2
foo,bar,123456789012345678901234567890123456789012345678901234567890"

What is the expected behavior?

col1,col2
foo,"bar,123456789012345678901234567890123456789012345678901234567890"

Strings with commas that are <= 63 characters output correctly:

import polars as pl

# <= 63 character string works
df_63_char = pl.DataFrame(
{
    "col1": ["foo"],
    "col2": ["ba,123456789012345678901234567890123456789012345678901234567890"],
  }
)

df_63_char.write_csv("working_63_output.csv")

working_63_output.csv

col1,col2
foo,"ba,123456789012345678901234567890123456789012345678901234567890"

As well as converting polars into a pandas dataframe, then exporting to CSV via pandas:

import polars as pl
import pandas as pd

df_64_char = pl.DataFrame(
{
    "col1": ["foo"],
    "col2": ["bar,123456789012345678901234567890123456789012345678901234567890"],
  }
)

dfp = df_64_char.to_pandas()
dfp.to_csv("pandas_working_64_output.csv", index=False)

pandas_working_64_output.csv

col1,col2
foo,"bar,123456789012345678901234567890123456789012345678901234567890"

What do you think polars should have done?

Correctly quote any strings of any length, including those that contain any number of commas ..