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that escapes characters that are unsafe as Javadoc comments. Such characters include '<' and '&'.
Note that this class doesn't escape other Unicode characters that are typically unsafe. For example, 愛 (A kanji that means "love") can be considered as unsafe because javac with English Windows cannot accept this character in the source code.
If the application needs to escape such characters as well, then they are on their own.
if (ch == '<')
if (ch == '&')
public void write (@Nonnull final char  buf, @Nonnegative final int off, @Nonnegative final int len) throws IOException
for (int i = 0; i < len; i++)
public void write (@Nonnull final String buf, @Nonnegative final int off, @Nonnegative final int len) throws IOException