I'm not sure about doing it directly from the command-line without any extra step, and I'm hesitant to try anything on my client's AccuRev setup. That said, according to the entry on accurev keep
from the CLI manual:
–c <comment>
Specify a comment for the transaction. The next command-line argument should be
a quoted string. Alternatively, the next argument can be in the form
@<comment-file>, which uses the contents of text-file <comment-file> as the
comment.
Default: enter a comment interactively, using the text editor named in
environment variable EDITOR (or a system-dependent default editor).
Reading this, I see two ways you can do what you want from the command line (meaning, not using the GUI).
1.) Pipe or cat your stat info into file, the use the @file syntax to get it into your commit
2.) Get your stat into into your clipboard, then don't give an argument to the keep command, let your editor open up, paste, save, and close.
There may be a way to get this all done via CLI without these middle-steps (perhaps you need to format the \x0a into \r\n or something?), but as I said, I'm unwilling to try it on my AccuRev setup as AccuRev gives me (and everyone else) enough trouble as it is.
HTH