Fix typo in `pdbfixer` YAML section
@@ -176,8 +176,8 @@ This directs PDBFixer to remove some heterogen residues from the PDB file:
Valid Options: [none]/water/all
-Adding missing residues and atoms atoms
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Adding missing residues and atoms
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Add missing atoms (including entire residues, loops, and termini).
