From a8c3c45fafb24153daf566bb0dc55858c6838150 Mon Sep 17 00:00:00 2001
From: Dean Eigenmann <dean@tokenate.io>
Date: Fri, 22 Feb 2019 12:58:59 +0100
Subject: [PATCH 1/2] Update 0_beacon-chain.md

---
 specs/core/0_beacon-chain.md | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 0556f3178..f7aa1c6d7 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -1028,10 +1028,7 @@ def is_power_of_two(value: int) -> bool:
     """
     Check if ``value`` is a power of two integer.
     """
-    if value == 0:
-        return False
-    else:
-        return 2**int(math.log2(value)) == value
+    return (value > 0) && (value & (value - 1) == 0)
 ```
 
 ### `int_to_bytes1`, `int_to_bytes2`, ...

From e1fc8a5765eb225f1c3485935b63a6c6bef3f5d4 Mon Sep 17 00:00:00 2001
From: Dean Eigenmann <dean@tokenate.io>
Date: Fri, 22 Feb 2019 13:00:29 +0100
Subject: [PATCH 2/2] Update 0_beacon-chain.md

---
 specs/core/0_beacon-chain.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index f7aa1c6d7..5c6718137 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -1028,7 +1028,7 @@ def is_power_of_two(value: int) -> bool:
     """
     Check if ``value`` is a power of two integer.
     """
-    return (value > 0) && (value & (value - 1) == 0)
+    return (value > 0) and (value & (value - 1) == 0)
 ```
 
 ### `int_to_bytes1`, `int_to_bytes2`, ...