autoformat model, phetsims/phet-info#216

doc/model.md

@@ -37,14 +37,14 @@ A summary of the symbols used in this simulation:
 A _Fourier Series_ decomposes a periodic function into a set of sines or cosines. The
 _series type_ refers to whether the Fouriers Series uses sines (a _sine series_) or cosines (a _cosine series_[](url)).
 
-The sines or cosines are referred to as _harmonics_ or _components_, terms that you can feel free to
-use interchangeably. For pedagogical reasons, the **Discrete** and **Wave Game** screens refer to _harmonics_
-while the **Wave Packet** screen refers to _components_. The more harmonics that are used in a Fourier Series,
-the more accurately a periodic function can be approximated.
+The sines or cosines are referred to as _harmonics_ or _components_, terms that you can feel free to use
+interchangeably. For pedagogical reasons, the **Discrete** and **Wave Game** screens refer to _harmonics_
+while the **Wave Packet** screen refers to _components_. The more harmonics that are used in a Fourier Series, the more
+accurately a periodic function can be approximated.
 
 Each harmonic has an _order_ or _harmonic number_, numbered starting from 1. The
-_fundamental harmonic_ (or simply _fundamental_) is the lowest frequency of the periodic function, its order is 1,
-and its amplitude is A<sub>1</sub>.
+_fundamental harmonic_ (or simply _fundamental_) is the lowest frequency of the periodic function, its order is 1, and
+its amplitude is A<sub>1</sub>.
 
 ## Discrete screen
 
@@ -84,13 +84,11 @@ user's guess. When the amplitudes of the guess series match the amplitudes of th
 challenge.
 
 The Amplitudes (top) chart allows the user to set amplitudes for the guess series. The Harmonics (middle) chart plots
-each harmonic in the
-guess series. The Sum (bottom) chart shows the guess series (in black) superimposed on top of the answer series (in
-hot pink).
+each harmonic in the guess series. The Sum (bottom) chart shows the guess series (in black) superimposed on top of the
+answer series (in hot pink).
 
 Each level of the game has a different number of non-zero harmonics in the challenge, and a different number of '
-Amplitude
-Controls' (sliders and keypads) for setting amplitudes. Each challenge includes some controls for
+Amplitude Controls' (sliders and keypads) for setting amplitudes. Each challenge includes some controls for
 zero-amplitude harmonics, to make the challenges a bit more difficult. The student can increase the number of
 zero-amplitude controls using the 'Amplitude Controls' spinner, but each level has a minimum number of controls.