dedent_run_these_lines() should handle indentation less than shiftwidth (e.g., restructured text)

[ariddell]

This is for the wishlist. It would be nice to be able to run code directly from restructured text documents where the initial indentation is 2 or 3. For example

This is some sphinx documentation with examples:

.. ipython:: python
   import os
   import matplotlib.pyplot as plt
   import numpy as np
   import scipy.stats

dedent_run_these_lines() will not work on this -- because the indentation is only three spaces. This is a quick hack I have to get it to work, if count == 0, then set count = 1 so it tries to indent. I'm sure there's a better way..

def dedent_run_these_lines():
    r = vim.current.range
    shiftwidth = vim.eval('&shiftwidth')
    count = int(vim.eval('indent(%d+1)/%s' % (r.start,shiftwidth)))
    if count == 0:
       count = 1
    if count > 0:
       vim.command("'<,'>" + "<"*count)
    run_these_lines()
    if count > 0:
       vim.command("silent undo")

Thanks!