SuperRedCloth inserting <pre><code>

I maintain a web application frozen to version Ruby 1.8.6 and RedCloth
3.0.4

Whenever I insert a newline followed by a white space, SuperRedCloth,
wraps the text with

 tags.

Say for example I write

###############
Hi

 This is me

###############

This piece of text gets translated to

Hi

This is me

rather than

Hi

This is me

This doesn’t correspond to the specifications of Textile as shown on the
link below

http://hobix.com/textile/

Is this a bug of RedCloth version 3.0.4?

I’d call it a bug, but I think in RedCloth 3.0.4 it’s a “feature.”
That version was trying to be compatible with both Textile and
Markdown. Indenting a block of code is a Markdown style.

RedCloth 4.0 should be better.