[El1as42]

Closes #208

In OneNote, the paragraphs of a page are on consecutive lines, but pandoc separates each paragraph with a blank line. So the lines of a page are spread apart in the markdown.

Changes

• New config option $paragraphSeparator: 1 separates paragraphs with a blank line (default, existing behavior), 2 with a newline, like in OneNote. E.g. foo\n\nbar becomes foo\nbar.
  • Paragraphs separated by an empty paragraph are still separated by a blank line.
  • Lists, tables, headings, code, and quotes keep their blank lines, since they would otherwise change meaning (e.g. a line after a list item would become part of it). Paragraphs within a quote are separated by a newline.
  • Lines that would turn the previous line into a heading (e.g. ===) also keep their blank line.
• README.md and config.example.ps1 document the option.

Markdown viewers like Obsidian show a newline as a line break (unless its "Strict line breaks" setting is on), while others like GitHub join such lines into one paragraph. This is why it is an option, and noted in its description.

Note: with $keepspaces = 1, an empty paragraph currently becomes three blank lines. #209 changes this to a single blank line, which this option builds on, but the two PRs do not depend on each other.

Tests: a New-SectionGroupConversionConfig test for both values, with paragraphs, an empty paragraph, an image, a heading, a list, a table, a quote, and ===. Unit tests pass on Windows PowerShell 5.1 and PowerShell 7.0. In this repo's CI (run on my fork), all jobs that can currently run pass: Windows PowerShell 5.1 (windows-2022) and PowerShell 7.1 to 7.4. The other jobs currently fail for any PR, before checkout: the windows-2019 runner image was retired, and the PowerShell 6.0 to 7.0 container images are too old for actions/checkout (GLIBC_2.28' not found). Also tested on real notebook pages: lines that follow each other in OneNote follow each other in the markdown, and empty paragraphs become blank lines.

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