Merge petertodd#254: docs: fix simple typo, probabably -> probably

b57bbeb docs: fix simple typo, probabably -> probably (Tim Gates)

Pull request description:

  There is a small typo in bitcoin/core/serialize.py.

  Should read `probably` rather than `probabably`.

  Semi-automated pull request generated by
  https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

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Tree-SHA512: 64b62815a46ca5b8b94d1e7de466587b1a0a5b1e417ec4988cf019c3caab2ee26053733c660f64ac0bf9b2515ea266657f253a0839a9cb4bbddc441a02b41f40

Author: petertodd

bitcoin/core/serialize.py

@@ -11,7 +11,7 @@
 
 """Serialization routines
 
-You probabably don't need to use these directly.
+You probably don't need to use these directly.
 """
 
 from __future__ import absolute_import, division, print_function, unicode_literals