fluent calls requiring method name to be next to the paren

I stumbled on this using fluent API, it is required for the method name to be next to the paren:

```fsharp
type C() =
member this.M() = this
member this.M2 o = this

let c =
C()
.M()
.M2(1)
.M ()
.M2 (3)
```

> error FS0039: The type 'Unit' does not define the field, constructor or member 'M2'.
> error FS0501: The member or object constructor 'M' takes 0 argument(s) but is here given 1. The required signature is 'member C.M: unit -> C'.

Wondering if this is something to improve on, the error messages are a bit confusing, despite they make sense when considering function application.

related: #1103 & https://github.com/fsharp/fslang-suggestions/issues/999