rows of wsk activation list have trailing whitespaces

i can't `grep 'foo$'` in the output of `wsk activaton list`, because the lines end with a bunch of whitespace

e.g. i want to look for lines that end with my selected action name, because i might have both "foo" and "foo-rule", so i can't just grep for foo (yes, i can grep -v foo-rule, but this seems like an easy thing to fix in the CLI)