Fix task-list checkbox styling (#10668)

* Fix task-list checkbox styling

The pandoc renderer will append the class "task-list" to the ul element
wrapping a li with one or more check-boxes. This allows us to select for
them, removing their list-style-type property. However, goldmark and the
gfm spec doesn't specify the "task-list" class name, so we can't use
that to fix the issue there.

Signed-off-by: Alexander Scheel <alexander.m.scheel@gmail.com>

* Update to goldmark v1.1.25

This version adds the missing space after a checkbox.

Resolves: #9656

Signed-off-by: Alexander Scheel <alexander.m.scheel@gmail.com>

Co-authored-by: zeripath <art27@cantab.net>

vendor/github.com/yuin/goldmark/extension/tasklist.go

@@ -92,9 +92,9 @@ func (r *TaskCheckBoxHTMLRenderer) renderTaskCheckBox(w util.BufWriter, source [
 		w.WriteString(`<input disabled="" type="checkbox"`)
 	}
 	if r.XHTML {
-		w.WriteString(" />")
+		w.WriteString(" /> ")
 	} else {
-		w.WriteString(">")
+		w.WriteString("> ")
 	}
 	return gast.WalkContinue, nil
 }

vendor/github.com/yuin/goldmark/parser/list.go

@@ -166,20 +166,6 @@ func (b *listParser) Continue(node ast.Node, reader text.Reader, pc Context) Sta
 		}
 		return Continue | HasChildren
 	}
-	// Thematic Breaks take precedence over lists
-	if isThematicBreak(line, reader.LineOffset()) {
-		isHeading := false
-		last := pc.LastOpenedBlock().Node
-		if ast.IsParagraph(last) {
-			c, ok := matchesSetextHeadingBar(line)
-			if ok && c == '-' {
-				isHeading = true
-			}
-		}
-		if !isHeading {
-			return Close
-		}
-	}
 
 	// "offset" means a width that bar indicates.
 	//    -  aaaaaaaa
@@ -200,6 +186,21 @@ func (b *listParser) Continue(node ast.Node, reader text.Reader, pc Context) Sta
 				if !list.CanContinue(marker, typ == orderedList) {
 					return Close
 				}
+				// Thematic Breaks take precedence over lists
+				if isThematicBreak(line[match[3]-1:], 0) {
+					isHeading := false
+					last := pc.LastOpenedBlock().Node
+					if ast.IsParagraph(last) {
+						c, ok := matchesSetextHeadingBar(line)
+						if ok && c == '-' {
+							isHeading = true
+						}
+					}
+					if !isHeading {
+						return Close
+					}
+				}
+
 				return Continue | HasChildren
 			}
 		}