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_sdk.py b/scripts/cros_sdk.py
index 6e06bb9..37b5016 100644
--- a/scripts/cros_sdk.py
+++ b/scripts/cros_sdk.py
@@ -868,7 +868,7 @@
   if host != 'x86_64':
     cros_build_lib.Die(
         "cros_sdk is currently only supported on x86_64; you're running"
-        " %s.  Please find a x86_64 machine." % (host,))
+        ' %s.  Please find a x86_64 machine.' % (host,))
 
   _ReportMissing(osutils.FindMissingBinaries(NEEDED_TOOLS))
   if options.proxy_sim:
@@ -920,8 +920,8 @@
 
   if (options.delete and not options.create and
       (options.enter or any_snapshot_operation)):
-    parser.error("Trying to enter or snapshot the chroot when --delete "
-                 "was specified makes no sense.")
+    parser.error('Trying to enter or snapshot the chroot when --delete '
+                 'was specified makes no sense.')
 
   if (options.unmount and
       (options.create or options.enter or any_snapshot_operation)):
@@ -987,14 +987,14 @@
   # below if needed.
   if options.create and options.use_image:
     if missing_image_tools:
-      raise SystemExit('''The tool(s) %s were not found.
+      raise SystemExit("""The tool(s) %s were not found.
 Please make sure the lvm2 and thin-provisioning-tools packages
 are installed on your host.
 Example(ubuntu):
   sudo apt-get install lvm2 thin-provisioning-tools
 
 If you want to run without lvm2, pass --nouse-image (chroot
-snapshots will be unavailable).''' % ', '.join(missing_image_tools))
+snapshots will be unavailable).""" % ', '.join(missing_image_tools))
 
     logging.debug('Making sure chroot image is mounted.')
     with cgroups.SimpleContainChildren('cros_sdk'):
@@ -1122,8 +1122,8 @@
           osutils.SafeMakedirsNonRoot(target)
           continue
         lock.write_lock(
-            "Upgrade to %r needed but chroot is locked; please exit "
-            "all instances so this upgrade can finish." % src)
+            'Upgrade to %r needed but chroot is locked; please exit '
+            'all instances so this upgrade can finish.' % src)
         if not os.path.exists(src):
           # Note that while waiting for the write lock, src may've vanished;
           # it's a rare race during the upgrade process that's a byproduct