Retour à la ligne dans environnement de type ams theorem

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\documentclass[french]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{amsmath}
\usepackage{enumitem}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{babel}
\newtheoremstyle{break} % ⟨name⟩
{}                      % ⟨Space above⟩
{0.5cm}                 % ⟨Space below⟩
{\normalfont}           % ⟨Body font⟩
{}                      % ⟨Indent amount⟩
{\bfseries}             % ⟨Theorem head font⟩
{}                      % ⟨Punctuation after theorem head⟩
{\newline}              % ⟨Space after theorem head⟩
{}                      % ⟨Theorem head spec (can be left empty, meaning ‘normal’ )⟩
\theoremstyle{break}
\newtheorem{exo}{Exercice}
\ExplSyntaxOn
\bool_new:N \g_inside_exo_bool
\AddToHook{env/exo/begin}{
  \bool_gset_true:N \g_inside_exo_bool
  \AddToHookNext{para/begin}{\bool_gset_false:N \g_inside_exo_bool}
}
\AddToHook{env/enumerate/begin}{
  \bool_if:NT \g_inside_exo_bool {
    \leavevmode\vspace{-\baselineskip}
  }
}
\ExplSyntaxOff
\begin{document}
\begin{exo}
  bla
 
 
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