Tools: update with flake8

W605 invalid escape sequence '\s'
F402 import 'time' from line 10 shadowed by loop variable
E101 indentation contains mixed spaces and tabs
E703 statement ends with a semicolon

Tools/autotest/apmrover2.py

@@ -1019,7 +1019,7 @@ Brakes have negligible effect (with=%0.2fm without=%0.2fm delta=%0.2fm)
         self.change_mode("RTL")
         # location copied in from rover-test-rally.txt:
         loc = mavutil.location(40.071553,
-	                           -105.229401,
+                               -105.229401,
                                0,
                                0)
         self.wait_location(loc, accuracy=accuracy)
@@ -1720,7 +1720,7 @@ Brakes have negligible effect (with=%0.2fm without=%0.2fm delta=%0.2fm)
              lambda: self.drive_mission("rover1.txt")),
 
             # disabled due to frequent failures in travis. This test needs re-writing
-                # ("Drive Brake", self.drive_brake),
+            # ("Drive Brake", self.drive_brake),
 
             ("GetBanner", "Get Banner", self.do_get_banner),
 
@@ -1812,7 +1812,7 @@ Brakes have negligible effect (with=%0.2fm without=%0.2fm delta=%0.2fm)
         ret = super(AutoTestRover, self).rc_defaults()
         ret[3] = 1500
         ret[8] = 1800
-        return ret;
+        return ret
 
     def default_mode(self):
         return 'MANUAL'

Tools/autotest/arducopter.py

@@ -1782,7 +1782,7 @@ class AutoTestCopter(AutoTest):
         self.mavproxy.expect('BANG')
         self.set_rc(9, 1000)
         self.reboot_sitl()
-        self.context_pop();
+        self.context_pop()
 
         self.progress("Crashing with 3pos switch in disable position")
         loiter_alt = 10

Tools/autotest/common.py

@@ -589,13 +589,13 @@ class AutoTest(ABC):
             if l1 == l2:
                 # e.g. the first "QGC WPL 110" line
                 continue
-            if re.match("0\s", l1):
+            if re.match(r"0\s", l1):
                 # home changes...
                 continue
             l1 = l1.rstrip()
             l2 = l2.rstrip()
-            fields1 = re.split("\s+", l1)
-            fields2 = re.split("\s+", l2)
+            fields1 = re.split(r"\s+", l1)
+            fields2 = re.split(r"\s+", l2)
             # line = int(fields1[0])
             t = int(fields1[3]) # mission item type
             for (count, (i1, i2)) in enumerate(zip(fields1, fields2)):
@@ -1859,10 +1859,10 @@ class AutoTest(ABC):
         for desc in self.test_timings.keys():
             if len(desc) > longest:
                 longest = len(desc)
-        for desc, time in sorted(self.test_timings.iteritems(),
+        for desc, test_time in sorted(self.test_timings.iteritems(),
                                  key=self.show_test_timings_key_sorter):
             fmt = "%" + str(longest) + "s: %.2fs"
-            self.progress(fmt % (desc, time))
+            self.progress(fmt % (desc, test_time))
 
     def send_statustext(self, text):
         if sys.version_info.major >= 3 and not isinstance(text, bytes):