Merge pull request #913 from yixuan/bugfix

Proposed fixes for Stan User's Guide

Author: WardBrian

src/stan-users-guide/matrices-arrays.qmd

@@ -71,8 +71,7 @@ Tuples provide a way to represent a sequence of values of
 heterogeneous types.  For example, `tuple(int, real)` is the type of a
 pair consisting of an integer and a real number and `tuple(array[5]
 int, vector[6])` is the type of pairs where the first element is a
-five-element array of integers, the second entry is an integer, and
-the third is a six-element vector.
+five-element array of integers, and the second is a six-element vector.
 
 
 ### Tuple syntax {-}
@@ -409,12 +408,9 @@ operations involving multiple indexing and range indexing.
 
 Stan expressions are all evaluated before assignment happens, so there
 is no danger of so-called aliasing in array, vector, or matrix
-operations.  Contrast the behavior of the assignments to `u` and
-`x`, which start with the same values.
-
-The loop assigning to `u` and the compound slicing assigning to `x`.
-
- the following trivial Stan program.
+operations. In the following Stan program, contrast the behavior of
+the loop assignment to `u` and the compound slicing assignment to `x`,
+where `u` and `x` start with the same values.
 
 ```stan
 transformed data {