lint: fix quoting style everywhere

BUG=chromium:990019
TEST=`cros lint` is clean & CQ passes

Change-Id: I012966d34a45a01b3a940414b24316aee4ffe8af
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1731476
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Will Bradley <wbbradley@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/cros_generate_os_release_unittest.py b/scripts/cros_generate_os_release_unittest.py
index ae7e3af..745de71 100644
--- a/scripts/cros_generate_os_release_unittest.py
+++ b/scripts/cros_generate_os_release_unittest.py
@@ -20,45 +20,45 @@
 
   def setUp(self):
     # Use a fresh tempdir as the root for each test case.
-    self.osrelease = os.path.join(self.tempdir, "etc", "os-release")
-    self.osreleased = os.path.join(self.tempdir, "etc", "os-release.d")
+    self.osrelease = os.path.join(self.tempdir, 'etc', 'os-release')
+    self.osreleased = os.path.join(self.tempdir, 'etc', 'os-release.d')
     osutils.SafeMakedirs(self.osreleased)
 
   def testOnlyOsRelease(self):
     """Tests the script without /etc/os-release."""
-    osutils.WriteFile(os.path.join(self.osreleased, "TEST"), "hello")
+    osutils.WriteFile(os.path.join(self.osreleased, 'TEST'), 'hello')
     cros_generate_os_release.GenerateOsRelease(self.tempdir)
-    self.assertEquals("TEST=hello\n", osutils.ReadFile(self.osrelease))
+    self.assertEquals('TEST=hello\n', osutils.ReadFile(self.osrelease))
 
   def testOnlyOsReleaseD(self):
     """Tests the script without /etc/os-release.d."""
     osutils.RmDir(self.osreleased)
-    osutils.WriteFile(self.osrelease, "TEST=bonjour\n")
+    osutils.WriteFile(self.osrelease, 'TEST=bonjour\n')
 
     cros_generate_os_release.GenerateOsRelease(self.tempdir)
-    self.assertEquals("TEST=bonjour\n", osutils.ReadFile(self.osrelease))
+    self.assertEquals('TEST=bonjour\n', osutils.ReadFile(self.osrelease))
 
   def testFailOnDuplicate(self):
     """Tests with a field set both in os-release and os-release.d/."""
-    osutils.WriteFile(os.path.join(self.osreleased, "TEST"), "hello")
-    osutils.WriteFile(self.osrelease, "TEST=bonjour")
+    osutils.WriteFile(os.path.join(self.osreleased, 'TEST'), 'hello')
+    osutils.WriteFile(self.osrelease, 'TEST=bonjour')
 
     self.assertRaises(cros_build_lib.DieSystemExit,
                       cros_generate_os_release.GenerateOsRelease, self.tempdir)
 
   def testNormal(self):
     """Normal scenario: both os-release and os-release.d are present."""
-    osutils.WriteFile(os.path.join(self.osreleased, "TEST1"), "hello")
-    osutils.WriteFile(self.osrelease, "TEST2=bonjour")
+    osutils.WriteFile(os.path.join(self.osreleased, 'TEST1'), 'hello')
+    osutils.WriteFile(self.osrelease, 'TEST2=bonjour')
 
-    default_params = {"TEST1": "hello2",
-                      "TEST3": "hola"}
+    default_params = {'TEST1': 'hello2',
+                      'TEST3': 'hola'}
 
     cros_generate_os_release.GenerateOsRelease(self.tempdir,
                                                default_params=default_params)
     output = osutils.ReadFile(self.osrelease).splitlines()
     output.sort()
-    self.assertEquals(["TEST1=hello",
-                       "TEST2=bonjour",
-                       "TEST3=hola"],
+    self.assertEquals(['TEST1=hello',
+                       'TEST2=bonjour',
+                       'TEST3=hola'],
                       output)