You might want to review this change as it's my first time.  Be gentle. :-)

strings for the code to time and the setup code. Also added two
convenience functions for instantiating a Timer and calling its methods.

Make timings more consistent by temporarily disabling GC.

rather than showing weird numbers like 8.4e+03 usec.

Paul Moore's patch to have timeit.py check the current directory for
imports (instead of the directory for Lib/timeit.py).

an iterator (which can only be used once!).

(from 10) and in main() (from 1).

Add a -v option that shows the raw times.  Repeating it cranks up the
display precision.

Always use the "best of N" form of output.

- Make all local variables in the template start with an underscore,
  to prevent name conflicts with the timed code.

- Added a method to print a traceback that shows source lines from the
  expanded template.

- Use that method in main().

would have required refraining from using string methods -- too
painful.)

Changed the -s option so that multiple -s options are cumulative.

standard deviation.  Also add an XXX comment wondering if we should
refrain from using itertools.repeat().

versions.  Add -h/--help option to print doc string.

Usable from the command line or from a program.