more review comments

Author: weberse2

src/stan-users-guide/parallelization.Rmd

@@ -32,9 +32,8 @@ The higher-order reduce with summation facility maps evaluation of a
 function `g: U -> real`, which returns a scalar, to a list of type
 `U[]`, `{ x1, x2, ... }`, and performs as reduction operation a sum
 over the results. For instance, for a sequence of ```x``` values of
-type ```U```, ```{ x1, x2, ... }```, we might compute the sum:
-
-`g(x1) + g(x2) + ...`
+type ```U```, ```{ x1, x2, ... }```, we might compute the sum as
+`g(x1) + g(x2) + ...`.
 
 In probabilistic modeling this comes up when there are $N$
 conditionally independent terms in a likelihood. Because of the