addressed remaining comments

Author: t4c1

stan/math/prim/fun/scale_matrix_exp_multiply.hpp

@@ -50,7 +50,7 @@ scale_matrix_exp_multiply(const double& t, const EigMat1& A, const EigMat2& B) {
  * @param[in] A Matrix
  * @param[in] B Matrix
  * @param[in] t double
- * @return exponential of At multiplies B
+ * @return exponential of At multiplied by B
  */
 template <typename Tt, typename EigMat1, typename EigMat2,
           require_all_eigen_t<EigMat1, EigMat2>* = nullptr,

stan/math/prim/fun/simplex_constrain.hpp

@@ -52,7 +52,7 @@ auto simplex_constrain(const ColVec& y) {
  * The simplex transform is defined through a centered
  * stick-breaking process.
  *
- * @tparam T type of the vector
+ * @tparam ColVec type of the vector
  * @param y Free vector input of dimensionality K - 1.
  * @param lp Log probability reference to increment.
  * @return Simplex of dimensionality K.