Editing RCS log message?

[Jonathan Jessup]

Hello.  I'm trying to edit several RCS log messages using the command:

    rcs -m115.6:'This is a test.' Test.java

but it will not accept the string 'This is a test.' as valid input and
just replaces the log message with "This".

Does anyone know how I can get this to work?  Taking a file as input
would also be helpful.

Thanks,
Jon