1 files changed, 9 insertions, 2 deletions
diff --git a/docs/examples/tutorial/clibraries/queue3.pyx b/docs/examples/tutorial/clibraries/queue3.pyx
index cc84cf172..c15c48e15 100644
--- a/docs/examples/tutorial/clibraries/queue3.pyx
+++ b/docs/examples/tutorial/clibraries/queue3.pyx
@@ -1,7 +1,7 @@
-# queue.pyx
-
 cimport cqueue
 
+
+
 cdef class Queue:
     """A queue class for C integer values.
 
@@ -22,6 +22,7 @@ cdef class Queue:
         if self._c_queue is not NULL:
             cqueue.queue_free(self._c_queue)
 
+
     cpdef append(self, int value):
         if not cqueue.queue_push_tail(self._c_queue,
                                       <void*> <Py_ssize_t> value):
@@ -33,15 +34,19 @@ cdef class Queue:
     # the C-ish "extend()" method to e.g. "extend_ints()", and write
     # a new "extend()" method that provides a suitable Python interface by
     # accepting an arbitrary Python iterable.
+
     cpdef extend(self, values):
         for value in values:
             self.append(value)
 
+
     cdef extend_ints(self, int* values, size_t count):
         cdef int value
         for value in values[:count]:  # Slicing pointer to limit the iteration boundaries.
             self.append(value)
 
+
+
     cpdef int peek(self) except? -1:
         cdef int value = <Py_ssize_t> cqueue.queue_peek_head(self._c_queue)
 
@@ -52,6 +57,8 @@ cdef class Queue:
                 raise IndexError("Queue is empty")
         return value
 
+
+
     cpdef int pop(self) except? -1:
         if cqueue.queue_is_empty(self._c_queue):
             raise IndexError("Queue is empty")