[playground] Bug fix: prevent growing whitespaces in markdown table toggle

[potatowagon]

Before

Screen.Recording.2025-01-11.at.6.58.29.PM.mov

^ white spaces in table cell growing

After

Screen.Recording.2025-01-11.at.7.03.38.PM.mov

^ num of white spaces remain constant

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
lexical	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 20, 2025 1:37am
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[github-actions]

size-limit report 📦

Path	Size
lexical - cjs	29.07 KB (0%)
lexical - esm	28.89 KB (0%)
@lexical/rich-text - cjs	38.04 KB (0%)
@lexical/rich-text - esm	30.98 KB (0%)
@lexical/plain-text - cjs	36.57 KB (0%)
@lexical/plain-text - esm	28.26 KB (0%)
@lexical/react - cjs	39.84 KB (0%)
@lexical/react - esm	32.34 KB (0%)

[etrepum]

I can see why this works but I think the actual bug is that on import mapToTableCells doesn't discard the required space before and after the | delimiter

[potatowagon]

I can see why this works but I think the actual bug is that on import mapToTableCells doesn't discard the required space before and after the | delimiter

good idea, ill explore that in another PR since this is approved already (needs a re-approval on ammendment)