Gutenberg: Switching from text to heading only preserves first paragraph

[ellatrix]

To reproduce, transform a text block of min. 2 paragraphs into a heading. Only the first line is transformed into a heading, while the others disappear.

[youknowriad]

Related discussions in #484 and #465.

[nylen]

+1 to fixing this, it violates the principle of least surprise. I think one of two things should happen instead:

• Switching a multi-paragraph text block to a heading is disabled - this operation doesn't really make sense.
• The current paragraph only is transformed into a heading, and the block is split into either two or three blocks. If we keep a text block as containing multiple paragraphs, it seems potentially difficult to surface this function in the UI.

[jasmussen]

@youknowriad I think you fixed this? I can't seem to reproduce in master.

[youknowriad]

Yep, this is fixed now. Let's close it