Update cheatsheet.en.md

12.temporary_ins/90.electromagnetism-in-vacuum/10.maxwell-equations/20.overview/cheatsheet.en.md

@@ -264,9 +264,9 @@ _thus revolutionizing physics._
    \end{array}`$**   
    <br>
    * This equation plays an *important role in Neumann's induction phenomena*.   
-   The quantity $`\oint_{\Gamma\leftrightarrow S} \overrightarrow{E}\cdot\overrightarrow{dl}`$ 
-   with the historically imperfect name "electromotive force (emf)", homogeneous to a voltage, is the origin of an electric current
-   flowing through the contour $`\Gamma`$ if it represents a conductive circuit.
+   _The quantity $`\oint_{\Gamma\leftrightarrow S} \overrightarrow{E}\cdot\overrightarrow{dl}`$_
+   _with the historically imperfect name "electromotive force (emf)", homogeneous to a voltage, is the origin of an electric current_
+   _flowing through the contour $`\Gamma`$ if it represents a conductive circuit._
 
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