From 8c12896fa0ef6fcda9ea579cff61a3a7a037f853 Mon Sep 17 00:00:00 2001
From: Nishant Das <nish1993@hotmail.com>
Date: Fri, 28 Dec 2018 01:58:24 +0800
Subject: [PATCH] Cleanup merkle_root

Add docstring and fix spacing.
---
 specs/core/0_beacon-chain.md | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 50eb0d2a9..309499db9 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -954,10 +954,13 @@ def get_beacon_proposer_index(state: BeaconState,
 #### `merkle_root`
 
 ```python
-def merkle_root(values):
+def merkle_root(values):  
+    """
+    Merkleize ``values`` (where ``len(values)`` is a power of two) and return the Merkle root.
+    """
     o = [0] * len(values) + values
-    for i in range(len(values)-1, 0, -1):
-        o[i] = hash(o[i*2] + o[i*2+1])
+    for i in range(len(values) - 1, 0, -1):
+        o[i] = hash(o[i * 2] + o[i * 2 + 1])
     return o[1]
 ```