Merge pull request #21 from adafruit/linting

Used a generator to satisfy pylint

Author: evaherrada

Diff for: adafruit_avrprog.py

@@ -138,7 +138,7 @@ def program_file(self, chip, file_name, verbose=False, verify=True):
 
             read_hex_page(file_state, page_addr, page_size, page_buffer)
 
-            if all([v == 0xFF for v in page_buffer]):
+            if all(v == 255 for v in page_buffer):
                 if verbose:
                     print("skipping")
                 continue