[imcc] change .arg into .set_arg. Step 1/3. (this step includes all important stuff); docs and minor stuff later.
[imcc] change .arg into .set_arg. Step 1/3. (this step includes all important stuff); docs and minor stuff later.

git-svn-id: 25691d43496b77c53f0b494379003863a981bfc4@32034 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

bschmalhofer/m4