Missing retour chariot about tsi-ccs HOT 6 OPEN

branch tsi2 initial version

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heading tableaux 5 : créer 2 lignes au lien des BR

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tsi2 2015 : index 75/76 don't have right version in right column

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Table 5.1.b Groups of interoperability constituents in the Control-Command and Signalling On-board Subsystem -> a retour chariot is missing after Table 5.1.b

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Table 6.1 : use <ol> for numbered lists

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§7.6.2.7 : use proper list (<ol>)

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