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_deps_diff.py b/scripts/cros_deps_diff.py
index 1ef659b..b68d65f 100644
--- a/scripts/cros_deps_diff.py
+++ b/scripts/cros_deps_diff.py
@@ -38,7 +38,7 @@
     chars = [0] * 3
     for bit in range(0, 24):
       chars[bit % 3] |= ((index >> bit) & 0x1) << (7-bit/3)
-    return "#%02x%02x%02x" % tuple(chars)
+    return '#%02x%02x%02x' % tuple(chars)
 
 
 def GetReverseDependencyClosure(full_name, deps_map, divergent_set):