Corrected formatting of tags in third episode.

Author: sjdkay

_episodes/03-use_cases.md

@@ -40,9 +40,9 @@ Example command
 ```
 
 > ## `Beam Energies:` 
-> Whilst we can enter any number for the `electron\_beam\_energy` and `ion\_beam\_energy` values, there are only certain combinations actually in use.
-> `electron\_beam\_energy` is typically 5, 10 or 18 GeV
-> `ion\_beam\_energy` is typically 41, 100, 130, 250 or 275 for protons.
+> Whilst we can enter any number for the `electron_beam_energy` and `ion_beam_energy` values, there are only certain combinations actually in use.
+> `electron_beam_energy` is typically 5, 10 or 18 GeV
+> `ion_beam_energy` is typically 41, 100, 130, 250 or 275 for protons.
 > For other ion species, 110 and 166 may also be used.
 {: .callout}