Fix indentation for `RpcGenError`

Indentation for the exception was double what it should have been. This
change normalizes the indentation to a consistent standard with the rest
of the file.

Fix minor flake8 issues while here corresponding to the minimum number
of needed blank lines around the class and its methods.

Signed-off-by: Enji Cooper <yaneurabeya@gmail.com>

1 files changed, 9 insertions, 5 deletions

diff --git a/event_rpcgen.py b/event_rpcgen.py
index 9b66dfad..5b59c0db 100755
--- a/event_rpcgen.py
+++ b/event_rpcgen.py
@@ -41,12 +41,16 @@ def declare(s):
 def TranslateList(mylist, mydict):
     return [x % mydict for x in mylist]
 
-# Exception class for parse errors
+
 class RpcGenError(Exception):
-        def __init__(self, why):
-                self.why = why
-        def __str__(self):
-                return str(self.why)
+    """An Exception class for parse errors."""
+
+    def __init__(self, why):
+        self.why = why
+
+    def __str__(self):
+        return str(self.why)
+
 
 # Holds everything that makes a struct
 class Struct: