Allow choice between `write_cdata_element` and `write_text_element`

[ZNielsen]

Formatting (just a newline) for an rss description is not working for me. It appears the description of a channel is always written via write_text_element, while the description of an item is written with write_cdata_element.

I'm willing to do the work for this ask, but I'm not familiar enough with the mechanics to know if changing the channel description writer to write_cdata_element will break anything for people. Ideally (IMO) the description fields should have the same behavior. This can be done in a couple ways:

1) Change the channel description writer function to write_cdata_element.

• Very simple
• Not sure about backwards compatibility 2) Add some write option flags for fields so users can control how a field is written out.
• More complicated
• More control for users

Once someone with more knowledge on this would let me know their thoughts, I'll get started.

[andy128k]

Description usually contains HTML markup, so additional whitespace characters (e.g. newline) are ignored by RSS viewers.

[ZNielsen]

Yes, but my <br> tags are not rendering either.

[ZNielsen]

Do viewers not typically render HTML in the description tag? If this ask makes no sense I'm fine to close it. Just offering to do the work if it would be an improvement.

[andy128k]

If you want a <br> to be in a description, you need to set it explicitly. Like

channel.set_description("First line<br>Second line");

Generally, you may start with PR containing a failing test. This would be a good starting point to understand where the problem is (if any).

[ZNielsen]

Looks like this is just an issue with the specific reader I was testing on.