go to the beginning of the line when entering cell

IPython/html/static/notebook/js/cell.js

@@ -283,9 +283,8 b' var IPython = (function (IPython) {'
         var cursor = cm.getCursor();
         if (cursor.line === 0 && cursor.ch === 0) {
             return true;
-        } else {
-            return false;
         }
+        return false;
     };
 
     /**
@@ -297,10 +296,10 b' var IPython = (function (IPython) {'
         var cursor = cm.getCursor();
         if (cursor.line === (cm.lineCount()-1) && cursor.ch === cm.getLine(cursor.line).length) {
             return true;
-        } else {
-            return false;
         }
+        return false;
     };
+
     /**
      * enter the command mode for the cell
      * @method command_mode

IPython/html/static/notebook/js/keyboardmanager.js

@@ -108,8 +108,7 b' var IPython = (function (IPython) {'
                         IPython.notebook.select_prev();
                         IPython.notebook.edit_mode();
                         var cm = IPython.notebook.get_selected_cell().code_mirror;
-                        var prev_cursor = cell.code_mirror.getCursor();
-                        cm.setCursor(cm.lastLine(), prev_cursor.ch)
+                        cm.setCursor(cm.lastLine(), 0);
                         return false;
                     } else if (cell) {
                         var cm = cell.code_mirror;
@@ -134,8 +133,7 b' var IPython = (function (IPython) {'
                         IPython.notebook.select_next();
                         IPython.notebook.edit_mode();
                         var cm = IPython.notebook.get_selected_cell().code_mirror;
-                        var prev_cursor = cell.code_mirror.getCursor();
-                        cm.setCursor(0, prev_cursor.ch);
+                        cm.setCursor(0, 0);
                         return false;
                     } else if (cell) {
                         var cm = cell.code_mirror;