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Added set-nib! docs to README.

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Simon Brooke 2025-08-30 19:48:12 +01:00
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@ -95,6 +95,10 @@ Take this `angle`, and return a number between 0 and 360 that represents it as a
Set the ink with which the turtle draws to this `colour`, which should be a string representation of a colour known to CSS.
#### (set-nib! *n*)
Set the nib (width) of the pen to this `n`, which should be a number.
#### (sin *angle*)
Return the sine of this `angle`, considered to be expressed in degrees.