D400: bad autofix if the first line ends in a question mark

[AlexWaygood]

The autofix for D400 currently changes this:

def should_frob() -> bool:
    """Should we frob the bar?"""

To this:

def should_frob() -> bool:
    """Should we frob the bar?."""

Which seems pretty clearly worse! We probably just shouldn't offer an autofix if the first line ends in a question mark or exclamation mark?

List of keywords you searched for before creating this issue:

• D400
• ends-in-period

[yahayaohinoyi]

can i get assighned to this?

[yahayaohinoyi]

would send PR by EOD

[yahayaohinoyi]

First attempt: #13399