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Unsemantic linewrapping

[Inspired by a blog post I read: https://scott.mn/2014/02/21/semantic_linewrapping/. Text adapted.] Sometimes when editing a Markdown file, I wrap the lines semantically. Instead of inserting a newline at 70 columns (or whatever), or making paragraphs one long line, I put in newlines at a point that seems logical to me. This may seem silly, but it produces better diffs. Semantic linewrapping also makes editing snappier. I can delete, edit or insert sentences easily using linewise operations. Code-oriented text editors like Vim and [REDACTED] are really good at this kind of manipulation. Editing text that hasn't been wrapped semantically is a pain, though:

Start file

Here is a paragraph with some stuff in it. This is the second sentence. This
sentence is really long, and ugly, and the truth is that it basically says
nothing at all. This is the last sentence of the paragraph; thanks for reading!

End file

Here is a paragraph with some stuff in it. This is the second sentence. This is
the last sentence of the paragraph; thanks for reading!

View Diff

1,3c1,2
< Here is a paragraph with some stuff in it. This is the second sentence. This
< sentence is really long, and ugly, and the truth is that it basically says
< nothing at all. This is the last sentence of the paragraph; thanks for reading!
---
> Here is a paragraph with some stuff in it. This is the second sentence. This is
> the last sentence of the paragraph; thanks for reading!

Solutions by @delonleonard:

Created by: @NieDzejkob Tweet

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Solutions by @delonleonard: