I don’t understand the following behaviour:

```
julia> f(x::Real, y::Real) = x+y
f (generic function with 1 method)
julia> f(x::T, y::T) where T = x - y # 0.6 syntax; on 0.5 would be f{T}(x::T, y::T) = x - y
f (generic function with 2 methods)
julia> f(3, 4)
7
```

Shouldn’t the second, more specialized (to my eyes) method be called instead?