Fix: more forgiving drawer regexps

[progfolio]

Abstract regexp for beginning of :CONTENTS: drawers into a variable.
Allow whitespace before :CONTENTS: and :END: drawer markers.

Ran into the "No TOC node found" user-error despite having a :CONTENTS: drawer.
This pull relaxes the regexps for drawer delimiters to allow for space between bol and the delimiter.
More closely matches org-clock-drawer-end-re.

Thanks again for the package!

[alphapapa]

Thanks. We could use a defconst for the regexp, since it isn't intended to be changed.

[progfolio]

Good catch. Taken care of.

[progfolio]

Tidying up things on my end. Closing this issue, but feel free to use the patch if you like.

[alphapapa]

@progfolio Please don't close PRs that haven't been handled yet.

[progfolio]

Please don't close PRs that haven't been handled yet.

Noted. I don't use the package any more, so the patch is offered "as is".
I've unsubscribed from notifications for this pull so that you can keep it open.

[alphapapa]

Thanks.

[mpereira]

@alphapapa is this good to merge? I bumped into this error yesterday.

[alphapapa]

@progfolio Thanks for fixing this and for your patience.

@mpereira Thanks for the reminder and your patience.

[mpereira]

@alphapapa thank you for the time you put into your many packages and for sharing them with us 🙂