Improved IPython usage hint

Author: mksenzov

Chapter2_MorePyMC/MorePyMC.ipynb

@@ -150,7 +150,7 @@
       "\n",
       "`some_variable = pm.DiscreteUniform(\"discrete_uni_var\", 0, 4)`\n",
       "\n",
-      "where 0, 4 are the `DiscreteUniform`-specific lower and upper bound on the random variable. The [PyMC docs](http://pymc-devs.github.com/pymc/distributions.html) contain the specific parameters for stochastic variables. (Or use `??` if you are using IPython!)\n",
+      "where 0, 4 are the `DiscreteUniform`-specific lower and upper bound on the random variable. The [PyMC docs](http://pymc-devs.github.com/pymc/distributions.html) contain the specific parameters for stochastic variables. (Or use `object??`, for example `pm.DiscreteUniform??` if you are using IPython!)\n",
       "\n",
       "The `name` attribute is used to retrieve the posterior distribution later in the analysis, so it is best to use a descriptive name. Typically, I use the Python variable's name as the `name`.\n",
       "\n",
@@ -2613,4 +2613,4 @@
    "metadata": {}
   }
  ]
-}
+}