minor fix formatting

examples/simplecell/simplecell.ipynb

@@ -250,7 +250,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The ecodes_metadata dictionary defines parameters for each protocol: ljp is the liquid junction potential correction (14.0 mV). A LJP value is subtracted from each voltage value. Here, the membrane potential will be shifted in the hyperpolarising direction by 14 mV. ton and toff represent the start and stop times (in ms) for current injection."
+    "The `ecodes_metadata` dictionary defines parameters for each protocol: `ljp` is the liquid junction potential correction (14.0 mV). A [LJP](https://en.wikipedia.org/wiki/Liquid_junction_potential) value is subtracted from each voltage value. Here, the membrane potential will be shifted in the hyperpolarising direction by 14 mV. `ton` and `toff` represent the start and stop times (in ms) for current injection."
    ]
   },
   {