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/gconv_strip.py b/scripts/gconv_strip.py
index 7de2b2d..4c2e109 100644
--- a/scripts/gconv_strip.py
+++ b/scripts/gconv_strip.py
@@ -286,7 +286,7 @@
   if unknown_sticky_modules:
     logging.warning(
         'The following charsets were explicitly requested in STICKY_MODULES '
-        'even though they don\'t exist: %s',
+        "even though they don't exist: %s",
         ', '.join(unknown_sticky_modules))
   global_used = [charset in STICKY_MODULES for charset in charsets]
 
@@ -313,7 +313,7 @@
   parser = commandline.ArgumentParser()
   parser.add_argument(
       '--dry-run', action='store_true', default=False,
-      help='process but don\'t modify any file.')
+      help="process but don't modify any file.")
   parser.add_argument(
       'root', type='path',
       help='path to the directory where the rootfs is mounted.')