Fixed missing new lines

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -84,11 +84,6 @@ public class HtmlHelper {
     private static final int MAX_FULL_TEXT_SIZE = 1024 * 1024; // characters
     private static final int TRACKING_PIXEL_SURFACE = 25; // pixels
 
-    private static final List<String> heads = Collections.unmodifiableList(Arrays.asList(
-            "h1", "h2", "h3", "h4", "h5", "h6", "p", "ol", "ul", "table", "br", "hr"));
-    private static final List<String> tails = Collections.unmodifiableList(Arrays.asList(
-            "h1", "h2", "h3", "h4", "h5", "h6", "p", "ol", "ul", "li"));
-
     private static final HashMap<String, Integer> x11ColorMap = new HashMap<>();
 
     static {
@@ -1180,6 +1175,11 @@ public class HtmlHelper {
             private int plevel = 0;
             private int lindex = 0;
 
+            private final List<String> heads = Collections.unmodifiableList(Arrays.asList(
+                    "h1", "h2", "h3", "h4", "h5", "h6", "p", "ol", "ul", "table", "br", "hr"));
+            private final List<String> tails = Collections.unmodifiableList(Arrays.asList(
+                    "h1", "h2", "h3", "h4", "h5", "h6", "p", "ol", "ul", "li"));
+
             public void head(Node node, int depth) {
                 if (node instanceof TextNode)
                     if (plevel > 0) {
@@ -1295,7 +1295,8 @@ public class HtmlHelper {
             }
 
             p.tagName("div");
-            p.appendElement("br");
+            if (p.parent() != null)
+                p.after(document.createElement("br"));
         }
     }