fixed some janky things that autopep8 did

rtv/exceptions.py

@@ -1,27 +1,23 @@
 class SubmissionError(Exception):
-
-    "Submission could not be loaded"
+    """Submission could not be loaded"""
 
     def __init__(self, url):
         self.url = url
 
 
 class SubredditError(Exception):
-
-    "Subreddit could not be reached"
+    """Subreddit could not be reached"""
 
     def __init__(self, name):
         self.name = name
 
 
 class ProgramError(Exception):
-
-    "Problem executing an external program"
+    """Problem executing an external program"""
 
     def __init__(self, name):
         self.name = name
 
 
 class EscapeInterrupt(Exception):
-
-    "Signal that the ESC key has been pressed"
+    """Signal that the ESC key has been pressed"""