Test Liquid whitespace control (github#35651)

tests/fixtures/content/get-started/liquid/index.md

@@ -11,5 +11,6 @@ children:
   - /tips
   - /notes
   - /platform-specific
+  - /whitespace
   - /table-row-headers
 ---

tests/fixtures/content/get-started/liquid/whitespace.md

@@ -0,0 +1,30 @@
+---
+title: Whitespace
+intro: Demonstrates use of `-` in Liquid tags
+versions:
+  fpt: '*'
+  ghes: '*'
+  ghae: '*'
+  ghec: '*'
+type: how_to
+---
+
+## Paragraphs
+
+Text above.
+
+{% data variables.product.product_name %}
+
+Test below.
+
+## Paragraph
+
+Text before. {% data variables.product.product_name %} Text after.
+
+Cram{% ifversion fpt %}FPT{% endif %}ped.
+
+## List
+
+- One
+- {% data variables.product.product_name %}
+- Three

tests/rendering-fixtures/liquid.js

@@ -46,6 +46,25 @@ describe('extended Markdown', () => {
     expect($('h2#in-this-article + nav ul div.extended-markdown.linux').length).toBe(1)
   })
 
+  test('whitespace control', async () => {
+    const $ = await getDOM('/get-started/liquid/whitespace')
+    const html = $('#article-contents').html()
+    expect(html).toMatch('<p>GitHub</p>')
+    expect(html).toMatch('<p>Text before. GitHub Text after.</p>')
+    expect(html).toMatch('<li>GitHub</li>')
+    expect(html).toMatch('CramFPTped')
+
+    // Test what happens to `Cram{% ifversion fpt %}FPT{% endif %}ped.`
+    // when it's not free-pro-team.
+    {
+      const $ = await getDOM('/enterprise-server@latest/get-started/liquid/whitespace')
+      const html = $('#article-contents').html()
+      // Assures that there's not whitespace left when the `{% ifversion %}`
+      // yields an empty string.
+      expect(html).toMatch('Cramped')
+    }
+  })
+
   test('rowheaders', async () => {
     const $ = await getDOM('/get-started/liquid/table-row-headers')
     const tables = $('#article-contents table')

tests/rendering/server.js

@@ -301,14 +301,6 @@ describe('server', () => {
     ).toBe(true)
   })
 
-  test('handles whitespace control in liquid tags', async () => {
-    // example from markdown source of index:
-    // Liquid tags with {%- in lists should not result in newlines
-    // that convert to <p>s in <li>s
-    const $ = await getDOM('/')
-    expect($('li > p').length).toBe(0)
-  })
-
   test('renders liquid within liquid within liquid', async () => {
     const $ = await getDOM('/en/articles/enabling-required-status-checks')
     expect($('ol li').first().text().trim()).toBe(