minor typo in AccelStepper missing manual

[Michael Cheich]

I'm happy to have been using The Missing Manual for the AccelStepper library - it got me unstuck on using the enable features.  Thank you Jim!

I just wanted to point out a small typo in a referenced function call:

  setPinsInverted (directionPin, stepPin, enablePin) This form is for step/direction drivers. To set just the enable signal inverted, use setPinInverted(false, false, true). If an enable pin is not used, no value needs to be specified.

I believe this should be   setPinsInverted(false, false, true)

[Jim Larson]

Good catch! Thank you for your careful reading. I'm glad the manual is helpful to you.

The correction has been made.

                -jim