Scaladoc permits inheritDoc with different parameter names

[som-snytt]

Reproduction steps

Scala version: 2.13.12

getOrElseUpdate is missing defaultValue parameter

compare MapOps

The specific doc problem will be fixed by amending the aberrant signature in MapOps.

Problem

Scaladoc should either complain when inheritDoc but the parameter names do not align, or just fix the doc automagically.

Scala itself doesn't care about parameter names in overrides.

[som-snytt]

Scaladoc looks for param doc by name, so a renamed parameter does not inherit param doc. (JavaDoc inherits by param position.)

https://www.scala-lang.org/api/2.13.11/scala/collection/mutable/HashMap.html#getOrElseUpdate(key:K,defaultValue:=%3EV):V

The other request is to warn because there might be text referring to the name in the overridden method; but that text could be anywhere, not just in the method description. Enforcing style rules such as "when renaming a parameter, provide doc that explains why the change is meaningful" is not Scaladoc's job.