fix alignemtn

IPython/frontend/html/notebook/static/less/notebook.less

@@ -205,7 +205,7 @@ div.input {
 /* input_area and input_prompt must match in top border and margin for alignment */
 div.input_area {
     /*color: @fontBaseColor;*/
-    border: 1px solid @border_color;
+    border: 1px solid @light_border_color;
     .corner-all;
     background: @cell_background;
 }
@@ -457,3 +457,8 @@ a {
   text-decoration: underline;
 }
 
+p {
+
+margin-bottom:0;
+
+}

IPython/frontend/html/notebook/static/less/variables.less

@@ -3,6 +3,7 @@
 @cell_selected_background: darken(@notebook_background, 2%);
 @cell_background: darken(@notebook_background, 3.2%);
 @border_color: darken(@cell_selected_background, 31%);
+@light_border_color: darken(@cell_selected_background, 17%);
 @borderwidth : 1px;
 @fontBaseColor : black;