Wrong confusing warning FS1189 when using SRTP with active patterns

This is fine:

```f#
let inline IsEqual< ^t when ^t: equality> (x: ^t) =
x = x
```

But this is not:

```f#
let inline (|IsEqual|IsNonEqual|)< ^t when ^t : equality> (x: ^t) =
if x = x then -> IsEqual
else IsNonEqual
```


Note: the code above does not require an explicit SRTP, but I just wanted to keep it simple. The actual example came from my comment here: https://github.com/fsharp/fslang-suggestions/issues/661#issuecomment-548542518

It can be seen with any SRTP type constraint, the full warning being:

> warning FS1189: Remove spaces between the type name and type parameter, e.g. "type C<'T>", not type "C <'T>". Type parameters must be placed directly adjacent to the type name.

**Known workarounds**

Ignore the warning (but that will ignore it for the whole file).

**Other info**

It has been reported before, but writing `<^t` instead of `< ^t` will yield a syntax error. Though I doubt that is the space the compiler complains about.

Also: the actual warning doesn't seem tailored for SRTP, it shows examples for normal type constraints, which can be confusing.