ParReduce: Fix comments (#5238)

Author: WeiqunZhang

.github/workflows/dependencies/ubuntu_free_disk_space.sh

@@ -20,19 +20,35 @@ apt list --installed
 sudo apt-get remove -y '^apache.*'
 sudo apt-get remove -y '^aspnetcore.*'
 sudo apt-get remove -y '^azure.*'
+sudo apt-get remove -y '^buildah$'
+sudo apt-get remove -y '^containerd.*'
+sudo apt-get remove -y '^docker-ce$'
+sudo apt-get remove -y '^docker-ce-cli$'
 sudo apt-get remove -y '^dotnet.*'
 sudo apt-get remove -y '^firebird.*'
 sudo apt-get remove -y '^firefox.*'
 sudo apt-get remove -y '^google.*'
 sudo apt-get remove -y '^hhvm.*'
+sudo apt-get remove -y '^humanity-icon-theme$'
+sudo apt-get remove -y '^kubectl$'
+sudo apt-get remove -y '^libruby3\.2$'
+sudo apt-get remove -y '^mecab-ipadic$'
+sudo apt-get remove -y '^mercurial.*'
+sudo apt-get remove -y '^mesa-libgallium$'
 sudo apt-get remove -y '^microsoft.*'
 sudo apt-get remove -y '^mongodb.*'
 sudo apt-get remove -y '^mono-.*'
 sudo apt-get remove -y '^monodoc-.*'
 sudo apt-get remove -y '^mysql.*'
 sudo apt-get remove -y '^php.*'
+sudo apt-get remove -y '^podman$'
+sudo apt-get remove -y '^postgresql-16$'
 sudo apt-get remove -y '^powershell.*'
+sudo apt-get remove -y '^python3-botocore$'
+sudo apt-get remove -y '^ruby3\.2-doc$'
+sudo apt-get remove -y '^shellcheck$'
 sudo apt-get remove -y '^snapd.*'
+sudo apt-get remove -y '^skopeo$'
 sudo apt-get remove -y '^temurin.*'
 
 sudo apt-get autoremove -y

Src/Base/AMReX_ParReduce.H

@@ -186,9 +186,10 @@ ParReduce (TypeList<Ops...> operation_list, TypeList<Ts...> type_list,
  * \param fa     a MultiFab/FabArray object used to specify the iteration space
  * \param nghost the number of ghost cells included in the iteration space
  * \param ncomp  the number of components in the iteration space
- * \param f      a callable object returning GpuTuple<T>.  It takes four ints,
- *               where the first int is the local box index and the others are
- *               spatial indices for x, y, and z-directions.
+ * \param f      a callable object returning GpuTuple<T>.  It takes five ints,
+ *               where the first int is the local box index, the next three are
+ *               spatial indices for x, y, and z-directions, and the last is for
+ *               component.
  *
  * \return reduction result (T)
  */