doc changes

hoomd/md/pair/pair.py

@@ -2039,15 +2039,16 @@ class WangFrenkel(Pair):
 
     .. math::
         \alpha = 2 \nu \left(\frac{R}{\sigma}\right)^{2\mu}
-                 \left(\frac{2 \nu + 1}{2\nu \left(\left(\frac{R}{\sigma}\right)^{2\mu} - 1\right)}\right)^{2\nu + 1}
+                 \left(\frac{2 \nu + 1}
+                 {2\nu \left(\left(\frac{R}{\sigma}\right)^{2\mu} - 1\right)}\right)^{2\nu + 1}
 
     The potential was introduced in `Xipeng Wang et al. 2020`_.
 
     .. _Xipeng Wang et al. 2020:
        https://dx.doi.org/10.1039/c9cp05445f
 
     Note:
-        In the original paper, the parameter `R` is explicitly equal to the cutoff.
+        In the original paper, the pair parameter R is explicitly equal to the cutoff.
 
     Example::