message: FIx typo & clarify argument type in comment
diff: @@ -117,7 +117,7 @@ class Profiler(object):
  ```python
  Typical use case:
  # Currently we are only allowed to create 1 profiler per process.
  - profiler = Profile(sess.graph)
  + profiler = Profiler(sess.graph)
  for i in xrange(total_steps):
  if i % 10000 == 0:
  @@ -174,7 +174,7 @@ class Profiler(object):
  """Add statistics of a step.
  Args:
  - step: A step uint64 used to identify the RunMetadata. Must be different
  + step: int, A step used to identify the RunMetadata. Must be different
  across different AddStep() calls.
  run_meta: RunMetadata proto that contains statistics of a session run.
  """
  