1) Add a hint to check for duplicates with optional files. The committed    text is a little bit modified to what was submitted.    The code example to automate a part of this was proposed by    Dmitry Morozovsky. 2) Remove trailing whitespace.
1) Add a hint to check for duplicates with optional files. The committed
   text is a little bit modified to what was submitted.
   The code example to automate a part of this was proposed by
   Dmitry Morozovsky.
2) Remove trailing whitespace.

Submitted by:	arundel

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