Remove trailing newlines in header

content/3.defense-systems/pd-t4-10.md

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     Effector: Unknown
     PFAM: Unknown
 contributors: 
-  - Alba Herrero del Valle
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+    - Alba Herrero del Valle
 relevantAbstracts:
     - doi: 10.1038/s41564-022-01219-4
-
-
 ---
 
 # PD-T4-10
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 ## Description
 The PD-T4-10 system is composed of 2 proteins: PD-T4-10_B and, PD-T4-10_A. This ORFs are overlapping and PD-T4-10_B is toxic while PD-T4-10_A neutralizes its toxicity, hinting to a toxin-antitoxin (TA) mechanism. It confers resitance to T2, T4, T6 and SECphi27 through an Abi defense mechanism :ref{doi=10.1038/s41564-022-01219-4}.
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 ## Molecular mechanism
 As far as we are aware, the molecular mechanism is unknown.
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 ## Example of genomic structure
 
 The PD-T4-10 system is composed of 2 proteins: PD-T4-10_B and, PD-T4-10_A.