all: Reformat C and Python source code with tools/codeformat.py.

This is run with uncrustify 0.70.1, and black 19.10b0.

examples/hwapi/button_reaction.py

@@ -4,14 +4,16 @@ from hwconfig import LED, BUTTON
 
 # machine.time_pulse_us() function demo
 
-print("""\
+print(
+    """\
 Let's play an interesting game:
 You click button as fast as you can, and I tell you how slow you are.
 Ready? Cliiiiick!
-""")
+"""
+)
 
 while 1:
-    delay = machine.time_pulse_us(BUTTON, 1, 10*1000*1000)
+    delay = machine.time_pulse_us(BUTTON, 1, 10 * 1000 * 1000)
     if delay < 0:
         print("Well, you're *really* slow")
     else: