njh/ruby-mqtt — pull request #33 by ytti (2013-12-13 09:03:01+00:00)
Title: Avoid 'warning: assigned but unused variable' warn

When $VERBOSE is true ruby will log error for unused variables, this
error can be suppressed by prefixing variable by '_', or having variable
named '_', which is canonical signal for 'unnecessary'

(refer to commit c9528f6a9e3157b349d3d81d20b9b4047ee9ff63 as well)