Remove invalid-string-quote from //testing

Removes the invalid-string-quote disable from the //testing pylintrc
file and fixes all resulting errors.

Bug: 353942917
Change-Id: I4e8ef60d4f7b7645fee7ee86d579032bb0c24eb1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5784807
Commit-Queue: Ben Pastene <[email protected]>
Auto-Submit: Brian Sheedy <[email protected]>
Reviewed-by: Ben Pastene <[email protected]>
Commit-Queue: Brian Sheedy <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1341341}
diff --git a/testing/merge_scripts/standard_gtest_merge_test.py b/testing/merge_scripts/standard_gtest_merge_test.py
index 3f1bd5f..c2e2466 100755
--- a/testing/merge_scripts/standard_gtest_merge_test.py
+++ b/testing/merge_scripts/standard_gtest_merge_test.py
@@ -567,7 +567,7 @@
     old_json_limit = standard_gtest_merge.OUTPUT_JSON_SIZE_LIMIT
     len0 = len(json.dumps(GOOD_GTEST_JSON_0))
     len1 = len(json.dumps(GOOD_GTEST_JSON_1))
-    large_shard = "0" if len0 > len1 else "1"
+    large_shard = '0' if len0 > len1 else '1'
     try:
       # Override max output.json size just for this test.
       standard_gtest_merge.OUTPUT_JSON_SIZE_LIMIT = min(len0, len1)