Inconsistent comment spacing when dumping YAML with `yaml_add_eol_comment`

[lyz-code]

I'm experiencing inconsistent comment spacing when using yaml_add_eol_comment with ruyaml. Specifically, the issue arises when adding end-of-line comments to YAML keys. Sometimes, the comment is not properly spaced, which can lead to formatting issues.

Steps to Reproduce:

Here's a minimal reproducible example:

from io import StringIO
from ruyaml import YAML
from textwrap import dedent

def check_comment_spacing() -> None:
    """Check for comment spacing issue in ruyaml."""
    print("Starting check for comment spacing issue.")
    yaml = YAML()

    source = dedent(
        """
        parent:
            child1: value1
            child2: value2
            child3: value3
        """
    )

    # Load YAML content
    data = yaml.load(source)

    # Add comments
    data["parent"].yaml_add_eol_comment(key="child3", comment="this is a comment")
    data["parent"].yaml_add_eol_comment(key="child2", comment="this is a comment")
    data["parent"].yaml_add_eol_comment(key="child1", comment="this is a comment")


    # Dump to a string
    string_stream = StringIO()
    yaml.dump(data, string_stream)
    source_code = string_stream.getvalue()
    string_stream.close()

    # Assert that there are two spaces between the value and the comment
    assert "value2  # this is a comment" in source_code, "Comment spacing issue detected!"
    assert "value3  # this is a comment" in source_code, "Comment spacing issue detected!"

    print("Comment spacing check completed.")

if __name__ == "__main__":
    check_comment_spacing()

Expected Behavior:

The output YAML should have two spaces between the value and the comment, like this:

parent:
    child1: value1  # this is a comment
    child2: value2  # this is a comment
    child3: value3  # this is a comment

Actual Behavior:

The second comment only adds one space :S

parent:
    child1: value1  # this is a comment
    child2: value2 # this is a comment
    child3: value3  # this is a comment

Please let me know if you need any additional information or if there's a known workaround for this issue. Thank you for your help!

[flaf]

Hi, same problem here. I have find this issue by chance while researching a solution via Google. :)
No, idea of the problem but, FYI, a workaround is to add the column=0 parameter:

 data["parent"].yaml_add_eol_comment(key="child1", comment="this is a comment", column=0)

I don't know why it works like this. It seems to me that it's a little bug.
Bye.