resolves #1632 workaround to produce valid xhtml

mermaid/src/worker.js

@@ -81,7 +81,13 @@ export class Worker {
         page.evaluate(async (definition, mermaidConfig) => {
           window.mermaid.initialize(mermaidConfig)
           try {
-            const { svg } = await window.mermaid.render('container', definition)
+            let { svg } = await window.mermaid.render('container', definition)
+            // workaround: https://github.com/yuzutech/kroki/issues/1632
+            // upstream issue: https://github.com/mermaid-js/mermaid/issues/1766
+            // taken from: https://github.com/mermaid-js/mermaid-live-editor/blob/83382901cd7e15414b6f18b48b7dd9c4775f3a21/src/lib/components/Actions.svelte#L23-L26
+            svg = svg
+              .replaceAll('<br>', '<br/>')
+              .replaceAll(/<img([^>]*)>/g, (m, g) => `<img ${g} />`)
             return { svg, error: null }
           } catch (err) {
             return {

mermaid/test/convert-test.mjs

@@ -16,7 +16,8 @@ const svgTests = [
   { content: 'Hello<br/>World' },
   { content: 'Hello<br>World' },
   { content: 'Hello<br >World' },
-  { content: 'Hello<br />World' }
+  { content: 'Hello<br />World' },
+  { content: 'Hello\\nWorld' }
 ]
 
 const pngTests = [
@@ -65,7 +66,7 @@ describe('#convert', function () {
         const worker = new Worker(browser)
         const result = await worker.convert(new Task(`graph TD
   A{{ ${testCase.content} }}`))
-        expect(result).to.contains('<span class="nodeLabel">Hello<br>World</span>')
+        expect(result).to.contains('<span class="nodeLabel">Hello<br/>World</span>')
       } finally {
         await browser.close()
       }