Margin tweaks for activecode

Author: ascholerChemeketa

runestone/activecode/css/activecode.css

@@ -67,6 +67,7 @@
 
 .ac_output {
     margin-top: 10px;
+    margin-bottom: -10px;
     display: none;
     background-color: inherit;
 }
@@ -156,3 +157,7 @@
     margin-bottom: 10px;
     min-height: 0px !important;
 }
+
+.codelens {
+    margin-bottom: 20px;
+}