Update moment_kinetic_equations.md

Couple typos

docs/src/moment_kinetic_equations.md

@@ -89,7 +89,7 @@ energy equation over $\tilde{v}_{\|}$ instead of $w_{\|}$,
   \tilde{p}_{\|,s}
   & = \frac{1}{\sqrt{\pi}}\int d\tilde{v}_{\|}\left(\tilde{v}_{\|}
       - \tilde{u}_{s}\right)^{2}\tilde{f}_{s}
-    = \int d\tilde{v}_{\|}\tilde{v}_{\|}^{2}\tilde{f}_{s}
+    = \frac{1}{\sqrt{\pi}}\int d\tilde{v}_{\|}\tilde{v}_{\|}^{2}\tilde{f}_{s}
       - \tilde{n}_{s}\tilde{u}_{s}^{2}\\
 %
   \tilde{q}_{\|,s}
@@ -184,7 +184,7 @@ tildes from here on)
   \frac{\partial u_{i}}{\partial t} + \frac{1}{n_{i}}\frac{\partial p_{\|,i}}{\partial z}
   + u_{i}\frac{\partial u_{i}}{\partial z} + \frac{1}{2}\frac{\partial\phi}{\partial z}
   &= -R_{in}n_{n}\left(u_{i}-u_{n}\right)
-    + R_{\mathrm{ion}}\frac{n_{i}n_{n}}{n_{s}}\left(u_{n}-u_{i}\right)
+    + R_{\mathrm{ion}}n_{i}n_{n}\left(u_{n}-u_{i}\right)
     - \frac{u_{i}}{n_{i}} \int dv_\parallel S_{i}
 \end{align}
 ```