Fix typos and add .Pp after the end of a display to separate the displayed text from the paragraph right after it.
Fix typos and add .Pp after the end of a display to separate the
displayed text from the paragraph right after it.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase