Unified all logging through Listen.logger. No need for private methods, public_send, or meta-code.
Removed comment about "clearing" the logger (this wasn't supported); added comment about setting logger to /dev/null if you don't want logging.
Added missing logger_spec including testing all supported values for LISTEN_GEM_DEBUGGING. Extended that support to include the string forms of all the useful levels: debug, info, warn, error, fatal.
Issue https://github.com/guard/listen/issues/497
public_send, or meta-code./dev/nullif you don't want logging.LISTEN_GEM_DEBUGGING. Extended that support to include the string forms of all the useful levels:debug,info,warn,error,fatal.