Slight modifications in recurrent docstrings

src/layers/recurrent.jl

@@ -47,9 +47,10 @@ Base.show(io::IO, m::Recur) = print(io, "Recur(", m.cell, ")")
 
 Reset the hidden state of a recurrent layer back to its original value.
 
-Assuming you have a `Recur` layer `rnn`, this is roughly equivalent to
-
+Assuming you have a `Recur` layer `rnn`, this is roughly equivalent to:
+```
 rnn.state = hidden(rnn.cell)
+```
 """
 reset!(m::Recur) = (m.state = m.init)
 reset!(m) = foreach(reset!, functor(m)[1])