#1287 removes URL tabs and newlines from an HTML script URL before
percent-decoding. A declaration such as %2<newline>fapp.js passed the
raw admission check and then decoded to a separator, resolving to a
file the encoded-separator rule must refuse. Apply canonical path
admission again to the parsed URL text.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>