Suppress extra p new line when margin/padding is zero

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

@@ -659,10 +659,16 @@ public class HtmlHelper {
                                     else if (key.endsWith("bottom"))
                                         p[0] = null;
 
-                                    if (p[0] != null && p[0] > 0.5)
+                                    if (p[0] != null)
-                                        element.attr("x-line-before", "true");
+                                        if (p[0] == 0)
-                                    if (p[2] != null && p[2] > 0.5)
+                                            element.attr("x-line-before", "false");
-                                        element.attr("x-line-after", "true");
+                                        else if (p[0] > 0.5)
+                                            element.attr("x-line-before", "true");
+                                    if (p[2] != null)
+                                        if (p[2] == 0)
+                                            element.attr("x-line-after", "false");
+                                        else if (p[2] > 0.5)
+                                            element.attr("x-line-after", "true");
                                 }
                                 break;
 
@@ -704,7 +710,8 @@ public class HtmlHelper {
 
         // Paragraphs
         for (Element p : document.select("p")) {
-            p.appendElement("br");
+            if (!"false".equals(p.attr("x-line-after")))
+                p.appendElement("br");
             p.tagName("div");
         }
 
@@ -958,13 +965,13 @@ public class HtmlHelper {
             div.tagName("span");
 
         for (Element e : document.select("*[x-line-before],*[x-line-after]")) {
-            if (!TextUtils.isEmpty(e.attr("x-line-before"))) {
+            if ("true".equals(e.attr("x-line-before"))) {
                 Element prev = e.previousElementSibling();
                 if (prev == null || !"br".equals(prev.tagName()))
                     e.prependElement("br");
             }
 
-            if (!TextUtils.isEmpty(e.attr("x-line-after"))) {
+            if ("true".equals(e.attr("x-line-after"))) {
                 Element next = e.nextElementSibling();
                 if (next == null || !"br".equals(next.tagName()))
                     e.appendElement("br");