Potentially fix leading whitespaces issues

Author: tneotia

lib/html_parser.dart

@@ -520,13 +520,19 @@ class HtmlParser extends StatelessWidget {
         }
         parentAfterText = parentAfter?.text ?? " ";
       }
+      if (tree.text?.contains("Linking") ?? false) {
+        print(keepLeadingSpace.data);
+        print(tree.text);
+        print(BLOCK_ELEMENTS.contains(tree.element?.localName ?? ""));
+      }
       /// If the text is the first element in the current tree node list, it
-      /// starts with a whitespace, it isn't a line break, and we don't need to
-      /// keep the whitespace, delete it.
+      /// starts with a whitespace, it isn't a line break, and either the
+      /// whitespace is unnecessary or it is a block element, delete it.
       if (textIndex < 1
           && tree.text!.startsWith(' ')
           && tree.element?.localName != "br"
-          && !keepLeadingSpace.data
+          && (!keepLeadingSpace.data
+              || BLOCK_ELEMENTS.contains(tree.element?.localName ?? ""))
       ) {
         tree.text = tree.text!.replaceFirst(' ', '');
       }

lib/src/html_elements.dart

@@ -70,6 +70,40 @@ const STYLED_ELEMENTS = [
   "ul",
 ];
 
+const BLOCK_ELEMENTS = [
+  "article",
+  "aside",
+  "blockquote",
+  "body",
+  "center",
+  "dd",
+  "div",
+  "dl",
+  "dt",
+  "figcaption",
+  "figure",
+  "footer",
+  "h1",
+  "h2",
+  "h3",
+  "h4",
+  "h5",
+  "h6",
+  "header",
+  "hr",
+  "html",
+  "li",
+  "main",
+  "nav",
+  "noscript",
+  "ol",
+  "p",
+  "pre",
+  "section",
+  "summary",
+  "ul",
+];
+
 const INTERACTABLE_ELEMENTS = [
   "a",
 ];