This should be an easy one, I am trying to run this code

```
import Measurements as M
import MonteCarloMeasurements as MCM
using Measurements
using MonteCarloMeasurements
n = 100
x = rand(n,5)
e = rand(n,5)/100
using BenchmarkTools, Statistics
@benchmark cov(x) .- cov(x .M.± e)
@benchmark cov(x) .- cov(x .MCM.± e)
```

and I have this error

`ERROR: syntax: space before "." not allowed in "x ."`

I have tried a few combinations like .M(.±) with no luck. How should we qualify something like `x .± e`

?