Added more spaces to L153

In order to completely overwrite any text from L172, I added 2 spaces
Merge pull request #355 from KevOrr/patch-1

Added more spaces to praw/helpers.py#L153
Fix #356. Comments are now savable.
Enable HTTPS everywhere.
Fix test_scope_read_get_submission_by_url test.
Make 3.0a1 version.
Remove deprecated methods.
Display name is case-sensitive. Closes #236.
Fix authorization URL domain.