Remove method-name duplicate description with trailing punctuation

[TomasVotruba]

RemoveMethodNameDuplicateDescriptionFixer already strips docblock descriptions that just repeat the method name (* Set name above setName()), but a trailing period or exclamation kept the line:

/**
 * Set name.
 */
public function setName()

Set name. → spaceless *Setname. which no longer equals *setName, so it survived.

Fix: rtrim(..., '.!') on the spaceless line before comparison, so trailing sentence punctuation is ignored.

Added fixture trailing_period.php.inc. phpstan/rector/ecs/phpunit green.

Note: this extends the existing rule rather than adding a new one — the plain Set name case was already covered.