Rules D212 and D213 are conflicting

[fkromer]

"""Summary.

Extensive docs.
"""

leads to "Multi-line docstring summary should start at the second line pydocstyle(D213)".

"""
Summary.

Extensive docs.
"""

leads to "Multi-line docstring summary should start at the first line pydocstyle(D212)".

Obviously these rules are conflicting and it's worth a note that pydocstyle is not usable out-of-the-box but requires configuration (ignoring at least one of these two rules).

[sambhav]

This seems incorrect. By default pydocstyle uses the pep257 configuration which explicitly ignore the two rules. See http://www.pydocstyle.org/en/5.0.1/usage.html#cli-usage and

Only one of --select, --ignore or --convention can be specified. If
none is specified, defaults to --convention=pep257.

And

http://www.pydocstyle.org/en/5.0.1/error_codes.html#default-conventions

The pep257 convention, which is enabled by default in pydocstyle, checks for all of the above errors except for D203, D212, D213, D214, D215, D404, D405, D406, D407, D408, D409, D410, D411, D413, D415, D416 and D417 (as specified in PEP257).