wrong links due to two definitions with same name

[PhoenixIra]

As already issued here: leanprover-community/mathlib4#15415

It seems that the documentation assumes x.abs to be the polymorphic version, but doesn't see that there is also a different version of abs in the local namespace.

This leads to confusion where one may assume that the absolute value of compex numbers is defined non-standard.

Link for reference: https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/SpecialFunctions/Complex/Arg.html#Complex.arg

[hargoniX]

This is going to be fixed once we refactor doc string rendering.