Added some padding between the text and the call tip to improve readability.

IPython/frontend/qt/console/call_tip_widget.py

@@ -120,13 +120,15 b' class CallTipWidget(QtGui.QLabel):'
         # Locate and show the widget. Place the tip below the current line
         # unless it would be off the screen. In that case, place it above
         # the current line.
+        padding = 3 # Distance in pixels between cursor bounds and tip box.
         cursor_rect = text_edit.cursorRect(cursor)
         screen_rect = QtGui.qApp.desktop().screenGeometry(text_edit)
         point = text_edit.mapToGlobal(cursor_rect.bottomRight())
+        point.setY(point.y() + padding)
         tip_height = self.size().height()
         if point.y() + tip_height > screen_rect.height():
             point = text_edit.mapToGlobal(cursor_rect.topRight())
-            point.setY(point.y() - tip_height)
+            point.setY(point.y() - tip_height - padding)
         self.move(point)
         self.show()
         return True