whitespace and some unicode/bytes

Minor changes.

DeDRM_plugin/kfxdedrm.py

@@ -5,6 +5,7 @@
 
 #  2.0   - Python 3 for calibre 5.0
 #  2.1   - Some fixes for debugging
+#  2.1.1 - Whitespace!
 
 
 import os
@@ -67,7 +68,7 @@ class KFXZipBook:
         print("Decrypting KFX DRM voucher: {0}".format(info.filename))
 
         for pid in [''] + totalpids:
-        	# Belt and braces. PIDs should be unicode strings, but just in case...
+            # Belt and braces. PIDs should be unicode strings, but just in case...
             if isinstance(pid, bytes):
                 pid = pid.decode('ascii')
             for dsn_len,secret_len in [(0,0), (16,0), (16,40), (32,40), (40,0), (40,40)]:
@@ -82,8 +83,8 @@ class KFXZipBook:
                 voucher.decryptvoucher()
                 break
             except:
-   				traceback.print_exc()
-                    pass
+                traceback.print_exc()
+                pass
         else:
             raise Exception("Failed to decrypt KFX DRM voucher with any key")