Unhelpful error when using named arguments on macro methods that do not support them

[Blacksmoke16]

This was brought up on the Discord, where the reduced code was something like:

https://play.crystal-lang.org/#/r/hj72

macro test(node)
  {% pp node.type.name generic_args: false %}
end
 
test name : Array(Int32)

In test.cr:5:1

 5 | test name : Array(Int32)
     ^---
Error: expanding macro


In test.cr:2:19

 2 | {% pp node.type.name generic_args: false %}
                     ^---
Error: named arguments are not allowed here


In test.cr:5:13

 5 | test name : Array(Int32)
                 ^
Error: named arguments are not allowed here

The trace points you to the right place, but the error could be a bit better. Maybe something along the lines of:

'Generic#name' does not allow named arguments

to make it more clear what specific overload does not support them.