Fix lint error
diff --git a/lint.ignore b/lint.ignore
index 04cbc26..1352ca8 100644
--- a/lint.ignore
+++ b/lint.ignore
@@ -94,6 +94,7 @@
 TRAILING WHITESPACE: webvtt/parsing/file-parsing/support/*.vtt
 TRAILING WHITESPACE: webvtt/parsing/file-parsing/tests/support/*.vtt
 TRAILING WHITESPACE: xhr/resources/headers-some-are-empty.asis
+TRAILING WHITESPACE: content-security-policy/support/manifest.json
 
 # Intentional use of print statements
 PRINT STATEMENT: dom/nodes/Document-createElement-namespace-tests/generate.py