Tweak `getTextBetween` to prepend `blockSeparator` to block node even if block node doesn't have any children

[hivokas]

Please describe your changes

Currently getTextBetween function doesn't prepend blockSeparator to block nodes without children.

This PR updates it to prepend blockSeparator to block nodes in any case (even if block node doesn't have any children).

How did you accomplish your changes

I have tweaked the implementation to not depend on child nodes of blocks when deciding whether blockSeparator should be prepended.

How have you tested your changes

I used preview link generated by Netlify bot below.

How can we verify your changes

Use preview link generated by Netlify bot below.

Remarks

Below are before/after examples.

Without empty paragraph

Hello!
How are you?

Before: 'Hello!'+BLOCK_SEPARATOR+'How are you?' After: 'Hello!'+BLOCK_SEPARATOR+'How are you?'

With empty paragraphs

Hello!

How are you?

Before: 'Hello!'+BLOCK_SEPARATOR+'How are you?' After: 'Hello!'+BLOCK_SEPARATOR+BLOCK_SEPARATOR+'How are you?' (it's breaking change, but I consider it a bugfix)

Checklist

• [x] The changes are not breaking the editor
• [ ] Added tests where possible
• [x] Followed the guidelines
• [x] Fixed linting issues

Related issues

N/A

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[knitevision1]

@bdbch @svenadlung +1 on this one Currently concurrent empty like breaks are not reflected in getText()

E.g. in the screenshots between line 2 and 5 there are 2 paragraphs (line breaks), but getText only returns one \n

getText vs DOM:

[hivokas]

@knitevision1 if this PR gets merged, you (and I) will be able to achieve the desired result with getText({ blockSeparator: '\n' }) (default separator is \n\n).

[hivokas]

@bdbch could you take a look at this PR when you get a moment? Looking at reactions in this PR, it looks like I'm not the only one who wants this change.

[hivokas]

Thanks @bdbch!

[itzcull]

When will this get released? So happy with this change, it's made dealing with whitespaced text content so annoying

[hivokas]

@itzcull it's released 🎉