MethodError prints "anonymous function" for anonymous functions

[Bumblebee00]

If a MethodError arises on a anonyomous function, the words "anonymous function" are printed in the error like so:

g=(x,y)->x+y
g(1,2,3)

ERROR: MethodError: no method of the anonymous function var"#5#6" matching (::var"#5#6")(::Int64, ::Int64, ::Int64)
The function `#5` exists, but no method is defined for this combination of argument types.

Closest candidates are:
  (::var"#5#6")(::Any, ::Any)
   @ Main REPL[4]:1

See the original pull request and issue #56325

[ararslan]

Looks good to me. Thanks for the contribution!