Normalized padding and cleaned up code

src/notebook/index.css

@@ -38,7 +38,7 @@
 
 
 .jp-MarkdownCell-content.p-Widget {
-  padding-left: 5.6px;
+  padding-left: 7px;
   padding-top: 7px;
   padding-right: 7px;
   padding-bottom: 7px;
@@ -81,7 +81,6 @@
 }
 
 
-
 .jp-MarkdownCell-content.p-Widget h5 {
   font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
   font-size: 14px;