Fix format errors found by autopep8.

Most of them are whitespace error.

BUG=None
TEST=make test

Change-Id: I3850dbf1ecc567e8c4bf1d00aba94f844328cbc3
Reviewed-on: https://chromium-review.googlesource.com/1218307
Commit-Ready: Pi-Hsun Shih <pihsun@chromium.org>
Tested-by: Pi-Hsun Shih <pihsun@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
diff --git a/py/tools/ghost.py b/py/tools/ghost.py
index bf421a8..2d8e9e7 100755
--- a/py/tools/ghost.py
+++ b/py/tools/ghost.py
@@ -181,7 +181,7 @@
       LOGCAT: 'Logcat',
       FILE: 'File',
       FORWARD: 'Forward'
-      }
+  }
 
   RANDOM_MID = '##random_mid##'
 
@@ -690,7 +690,7 @@
           except ValueError:
             p.stdin.write(ret)
         p.poll()
-        if p.returncode != None:
+        if p.returncode is not None:
           break
     except Exception as e:
       logging.error('SpawnShellServer: %s', e)
@@ -863,7 +863,7 @@
       target_dir = os.getenv('HOME', '/tmp')
 
       # Terminal session ID found, upload to it's current working directory
-      if params.has_key('terminal_sid'):
+      if 'terminal_sid' in params:
         pid = self._terminal_sid_to_pid.get(params['terminal_sid'], None)
         if pid:
           try:
@@ -1070,7 +1070,7 @@
             Ghost.SHELL: self.SpawnShellServer,
             Ghost.FILE: self.InitiateFileOperation,
             Ghost.FORWARD: self.SpawnPortForwardServer,
-            }[self._mode]
+        }[self._mode]
 
         # Machine ID may change if MAC address is used (USB-ethernet dongle
         # plugged/unplugged)