expressions in repl blocks are evaled

[kleinschmidt]

It seems like any Expr that's returned in a @repl block is evaled before it's printed. This doesn't happen in an @example block though. Here's an MWE:

markdown input

```@repl 1
a = 1
:(a + 1)
```

```@example 1
:(a + 1)
```

markdown output

```julia-repl
julia> a = 1
1

julia> :(a + 1)
2
```


```julia
:(a + 1)
```

```
:(a + 1)
```