Modifying values in .pdb file and save as new

for an assignment I have to read a small .pdb file in Python, change some values, and save it as a new .pdb file.
My original file is like this:

ATOM     19  HD2 TYR     1      26.910  61.717  39.871  1.00  0.00           H  ATOM     20  C   TYR     1      29.796  62.354  41.246  1.00  0.00           C  ATOM     23  H   SER     2      30.611  61.950  39.410  1.00  0.00           H  ATOM     24  CA  SER     2      30.082  64.035  39.354  1.00  0.00           C END 

I have tried with Pandas but with no success, as I cannot save it in the desired extension without it also saving an index, which I don't want (I used .to_csv('newfile.pdb')).
I have found a module called BioPython, and this is my attempt with it:

from Bio.PDB import PDBParser, PDBIOdef translate_atoms(structure, resname, translation_vector):    for model in structure:        for chain in model:            for residue in chain:                if residue.resname == resname:                    for atom in residue:                        atom.coord += translation_vectorpdb_file = "pdb1.pdb"# Read the PDB filepdb_parser = PDBParser(QUIET=True)structure = pdb_parser.get_structure("original_pdb1", pdb_file)# Translation vector for x direction (0.55 nm, so 5.5Å)translation_vector = [5.5, 0, 0]# Translate all atoms of SER residue in x directiontranslate_atoms(structure, "SER", translation_vector)# Write the modified structure to a new PDB fileoutput_pdb = "modified_pdb1.pdb"pdb_io = PDBIO()pdb_io.set_structure(structure)pdb_io.save(output_pdb)

This does what I want as far as changing the values but when I save it adds an unwanted line, like so:

ATOM     19  HD2 TYR     1      26.910  61.717  39.871  1.00  0.00           H  ATOM     20  C   TYR     1      29.796  62.354  41.246  1.00  0.00           C  ATOM     23  H   SER     2      36.111  61.950  39.410  1.00  0.00           H  ATOM     24  CA  SER     2      35.582  64.035  39.354  1.00  0.00           C  TER      33      SER     2END

How can I save it without that last line?

Thank you for your help!