Merge pull request #256 from nicain/master

Update detect_private_key.py

pre_commit_hooks/detect_private_key.py

diff --git a/pre_commit_hooks/detect_private_key.py b/pre_commit_hooks/detect_private_key.py
index feb2208..58ed827 100644
--- a/pre_commit_hooks/detect_private_key.py
+++ b/pre_commit_hooks/detect_private_key.py
@@ -8,6 +8,7 @@
     b'BEGIN DSA PRIVATE KEY',
     b'BEGIN EC PRIVATE KEY',
     b'BEGIN OPENSSH PRIVATE KEY',
+    b'BEGIN PRIVATE KEY',
 ]