Hello,
I want to show euros values on dashboard. But only the $ format are enable. When i changed the $ symbol to € i obtained an error.
How can I show euros value in a chart ?

I want something like "y_axis_format": "$,.2f" ==> to "y_axis_format": ",.2f€"

Regards,
Zied Sellami

Current behavior

Slack, email and other notifications provide a standardized text and backend info.

Proposed behavior

Users can add custom texts to the notifications.

Example

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@colleague, please analyze possible root causes.

Ideas for Imp

Describe the bug
bare decimals in arithmetic in evaluation parameters cause a parsing error

To Reproduce
Steps to reproduce the behavior:

1. Write an expectation with an evaluation parameter that...
2. has a urn and some simple arithmetic with...
3. a bare decimal value
4. execute the expectation and note the parsing failure

downstream_batch.expect_column_mean_to_b

Problem description

When I use the function of concatenating multiple columns, I find that it does not handle null values as expected.

This is the current output

df.concatenate_columns(["cat_1","cat_2","cat_3"],"cat",sep=",")

if they are not class methods then the method would be invoked for every test and a session would be created for each of those tests.

`class PySparkTest(unittest.TestCase):
@classmethod
def suppress_py4j_logging(cls):
logger = logging.getLogger('py4j')
logger.setLevel(logging.WARN)

@classmethod
def create_testing_pyspark_session(cls):
    return Sp