tweak ruby doc
tweak ruby doc

heapsource/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers