diff --git a/feedparser/encodings.py b/feedparser/encodings.py
index c699fe4c..da8f0a31 100644
--- a/feedparser/encodings.py
+++ b/feedparser/encodings.py
@@ -623,9 +623,9 @@ def read(self, size=-1):
 
         if self.offset < len(self.prefix):
             if size < 0:
-                chunk = self.prefix[self.offset:]
+                chunk = self.prefix[self.offset :]
             else:
-                chunk = self.prefix[self.offset:self.offset + size]
+                chunk = self.prefix[self.offset : self.offset + size]
                 size -= len(chunk)
             buffer += chunk
             self.offset += len(chunk)