message: clarify macro call
diff: @@ -141,8 +141,8 @@ Top-level component directory
  The top-level component directory contains a ``CMakeLists.txt``, e.g.,
  ``axom/src/components/sidre/CMakeLists.txt``, which contains the following items:
  - #. Checks for necessary dependencies with useful error or warning messages;
  - e.g.,::
  + #. A CMake macro call that checks for any of the required components and/or third-party dependencies
  + and errors out with a helpful message, e.g.,::
  axom_component_requires(NAME Sidre
  COMPONENTS SLIC
  