chore: make tests work properly on windows, moar doc

README.md

@@ -183,6 +183,8 @@ Ideally when we're relying on text files for test data input we'd want to have b
 
 So, testmark takes a rather brute-force approach to this problem and just strips out carriage return characters when they appear with a line-ending. In practice this _may_ impact the byte-perfect requirements for test fixtures, so you should be careful when using data that strays outside of standard printable character range, especially when control characters get involved. This is a text file format, if your data isn't text, then make it text by encoding in hex or base64 or something that reduces the character set to the safe range.
 
+The `Document#original` property and `toString()` function are going to result in text that only uses UNIX line endings (`\n`). So even your input document will be transformed if it does a round-trip through testmark on Windows. Be warned!
+
 ## Note about the package name
 
 Yes, `.js` extensions to packages such, but once upon a time, [Mark made a test](https://www.npmjs.com/package/test-mark) package and published it to npm, with only a package.json. npm now includes automatic typosquatting detection which they apparently cannot manually override, so nobody can publish a `testmark` package because of this. npm also refuses to remove `test-mark` even though it is a trivial package with no code in it which is in contravention with npm rules: ["Package names are considered squatted if the package has no genuine function."](https://docs.npmjs.com/policies/disputes). Yay.

test/test-parse.js

@@ -34,19 +34,28 @@ const exampleMdExpectedHunks = [
 describe('Read', () => {
   /** @type {string} */
   let exampleMdOriginal
+  let isWindows = false
 
   before(async () => {
     const exampleMd = new URL('../example.md', import.meta.url)
     exampleMdOriginal = await fs.promises.readFile(exampleMd, 'utf8')
+    isWindows = exampleMdOriginal.includes('\r\n')
   })
 
   it('can parse example.md', async () => {
     const doc = parse(exampleMdOriginal)
     assert.deepStrictEqual(exampleMdExpectedHunks, doc.dataHunks)
-    assert.deepStrictEqual(toString(doc), exampleMdOriginal)
+    if (isWindows) {
+      assert.deepStrictEqual(toString(doc), exampleMdOriginal)
+    } else {
+      assert.deepStrictEqual(toString(doc).replace('\n', '\r\n'), exampleMdOriginal)
+    }
   })
 
-  it('can parse example.md as windows', async () => {
+  it('can parse example.md as windows', async function () {
+    if (isWindows) { // skip test on windows
+      return this.skip()
+    }
     const exampleMdOriginalWindows = exampleMdOriginal.replace(/\r?\n/g, '\r\n')
     const doc = parse(exampleMdOriginalWindows)
     assert.deepStrictEqual(exampleMdExpectedHunks, doc.dataHunks)