Fixed a couple of broken links

docs/source/Discontinuities.ipynb

@@ -568,7 +568,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "That looks very good. By default, the code will run a [$\\chi^2$](https://pyproffit.readthedocs.io/en/latest/pyproffit.html#pyproffit.fitting.ChiSquared) minimization; if instead we wish to minimize the [C statistic](https://pyproffit.readthedocs.io/en/latest/pyproffit.html#pyproffit.fitting.Cstat), we can run the minimization again using the _method='cstat'_ option. \n",
+    "That looks very good. By default, the code will run a [chi-square](https://pyproffit.readthedocs.io/en/latest/pyproffit.html#pyproffit.fitting.ChiSquared) minimization; if instead we wish to minimize the [C statistic](https://pyproffit.readthedocs.io/en/latest/pyproffit.html#pyproffit.fitting.Cstat), we can run the minimization again using the _method='cstat'_ option. \n",
     "\n",
     "We can also fix the _bkg_ parameter since it is not very relevant in this region and its value is not well constrained"
    ]
@@ -1211,7 +1211,7 @@
    "source": [
     "We can see that all the chains are well converged after step 200.\n",
     "\n",
-    "We can inspect the output chain and create a two-dimensional corner plot using the [Corner](https://pyproffit.readthedocs.io/en/latest/pyproffit.html#pyproffit.fitting.Fitter.Emcee) method if the [corner](https://corner.readthedocs.io/en/latest/) library is installed. All the available arguments of the corner library can be passed directly to the code as shown in the example below"
+    "We can inspect the output chain and create a two-dimensional corner plot using the [Corner](https://pyproffit.readthedocs.io/en/latest/pyproffit.html#pyproffit.fitting.Fitter.Corner) method if the [corner](https://corner.readthedocs.io/en/latest/) library is installed. All the available arguments of the corner library can be passed directly to the code as shown in the example below"
    ]
   },
   {