Release Note: Source Details in Error Messages

When JavaDoc reports an issue in an input source file, it displays the source line for the issue, and a line containing a caret (`^`) pointing to the position on the line, in a manner similar to compiler (`javac`) diagnostic messages.

In addition, logging and other "info" messages are now written to the standard error stream, leaving the standard output stream to be used for output that is specifically requested by command-line options, such as command-line help.