fix linting

Author: eendebakpt

ipykernel/iostream.py

@@ -333,7 +333,7 @@ def __init__(
             the file descriptor by its number. It will spawn a watching thread,
             that will swap the give file descriptor for a pipe, read from the
             pipe, and insert this into the current Stream.
-        isatty: bool (default, False)
+        isatty : bool (default, False)
             Indication of whether this stream has termimal capabilities (e.g. can handle colors)
 
         """