Update textbook.fr.md

12.temporary_ins/42.quantum-mechanics/20.quantum-physics/05.quantum-physics/textbook.fr.md

@@ -14,7 +14,7 @@ lessons:
         name: PARALLELE Hamilt.Quant.ab (brainst.)
 ---
 
-\newcommand\oiint{\displaystyle\mathop{{\iint}\mkern-18mu \scriptsize \bigcirc}}     
+$`\newcommand\oiint{\displaystyle\mathop{{\iint}\mkern-18mu \scriptsize \bigcirc}}`$     
 $`\def\Ltau{\Large{\tau}\normalsize}`$
 $`\def\Sopen{\mathscr{S}_{\smile}}`$
 $`\def\Sclosed{\mathscr{S}_{\displaystyle\tiny\bigcirc}}`$
@@ -26,7 +26,7 @@ $`\newcommand{\bra}[1]{\langle #1|}`$
 $`\newcommand{\braket}[2]{\langle #1 | #2 \rangle}`$
 $`\newcommand{\braOket}[3]{\langle #1 | \hat{#2} | #3 \rangle}`$
 $`\newcommand{\dag}[1]{#1^{\dagger}}`$   
-\newcommand{\adj}[1]{\hat{#1}^{\dagger}}   
+$`\newcommand{\adj}[1]{\hat{#1}^{\dagger}}`$
 $`\newcommand{\braOadjket}[3]{\ket{#1}\,\hat{#2}^\dagger\bra{#3}}`$
 $`\newcommand{\ketbra}[2]{\ket{#1}\bra{#2}}`$