fix w3c/w3c-website#469 (comment) markup heading anchors remove markup from heading

Author: jean-gui

assets-src/js/main/heading-anchors.js

@@ -76,7 +76,7 @@ let headingAnchors = function () {
 					anchor.innerHTML = '<span aria-hidden="true">&sect;</span>'
 						+'<span class="visuallyhidden">'
 						+ translate.translate('anchor', languageCode) + '</span>';
-					heading.textContent += '\xa0';
+					heading.append('\xa0');
 					heading.appendChild(anchor);
 
 				});
@@ -88,4 +88,4 @@ let headingAnchors = function () {
 
 }
 
-export {headingAnchors};
+export {headingAnchors};

public/dist/assets/js/main.js

@@ -977,7 +977,8 @@ let headingAnchors = function () {
           anchor.setAttribute('href', '#' + anchorHref);
           anchor.setAttribute('class', 'heading-anchor');
           anchor.innerHTML = '<span aria-hidden="true">&sect;</span>' + '<span class="visuallyhidden">' + _translations__WEBPACK_IMPORTED_MODULE_0__.translate.translate('anchor', languageCode) + '</span>';
-          heading.textContent += '\xa0';
+          console.log(heading.textContent);
+          heading.append('\xa0');
           heading.appendChild(anchor);
         });
       }