Fix a typo in preface - Githubissues

AllenDowney / ThinkDSP

Think DSP: Digital Signal Processing in Python, by Allen B. Downey.

https://allendowney.github.io/ThinkDSP/

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Fix a typo in preface #23

Closed boltomli closed 8 years ago

AllenDowney commented 8 years ago

Thank you!