Inconsistency with splitres behaviour of gmx make_ndx

Fixed! Both names and splitting look fine

219 Protein_chain3_ILE_187:    19 atoms
220 Protein_chain3_TRP_188:    24 atoms
221 Protein_chain3_LYS_189:    22 atoms
222 Protein_chain3_LYS_190:    22 atoms
223 Protein_chain3_MET_191:    17 atoms
224 Protein_chain3_GLY_192:     8 atoms

Thank you for the patch! :)