Diff viewer text colour coding chokes on RegEx

[frandroid]

const handleSearch = (event: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) => {
    if (searchRef.current) {
      searchRef.current.value = searchRef.current.value.replace(/[\t\n\r"#$%&()*+,/:;<=>?@[\\^`{|}~]/g, "");
    }
    debouncedSearch(event.target.value);
  };

When looking at a diff that contains this code, the text goes blue on the slash after "replace(", and then it stays blue for the rest of the file. Except when highlighting text in strings, for which the text flips back to black, in a reverse of the main pattern.

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