[with patch, positive review] preparser does not respect leading space in front of "load foo.sage"

[ddrake]

If you have something like the following in a file:

try:
    load foo.sage
except:
    print 'uh oh'

it gets preparsed to this, and blows up because of the bad indentation:

try:
execfile("foo.py")
except:
    print 'uh oh'

The preparser is not honoring the leading space before the load statement.

[ddrake]

The problem was in sage-preparse; it ran a lstrip() on the line and never took into consideration the indentation.

I wanted to add some doctests, since as we see here, anything not tested is broken -- do the files in $SAGE_ROOT/local/bin get doctested?

[boothby]

works for me

[mabshoff]

Merged in Sage 3.3.alpha3