Merge pull request #608 from harryscholes/deque_docstrings

Fix `first` and `last` function names in `Deque` docstrings

Author: oxinabox

src/deque.jl

@@ -94,7 +94,7 @@ num_blocks(q::Deque) = q.nblocks
 Base.eltype(::Type{Deque{T}}) where T = T
 
 """
-    front(q::Deque)
+    first(q::Deque)
 
 Returns the first element of the deque `q`.
 """
@@ -105,7 +105,7 @@ function first(q::Deque)
 end
 
 """
-    back(q::Deque)
+    last(q::Deque)
 
 Returns the last element of the deque `q`.
 """