/ (?m:             # not capture, multiline
   .*              # skip anything
   [\w\.-]+        # the 'device' name part
   \s? (?:\(config[^\)]*\))?     # random '(config...)' part
   \s? [\$#?>]                  # real prompt end part
   \s? (?:\(enable\))? \s*      # random '(enable)' part
  $)
/x