Format: take autopep8 advice for blank lines
Format: take autopep8 advice for blank lines

For dictionary updates, style after cpu/vexriscv/core.py.

Signed-off-by: Tim Callahan <ea16a3c075a6a229c9a452aa4faba7441b41c040@google.com>

google/CFU-Playground,google/CFU-Playground,google/CFU-Playground,google/CFU-Playground