Apply suggestions from code review

Aligning the code with the style of this repository.

Co-authored-by: Sebastian Serth <[email protected]>

Author: AutoPING-TUI

app/javascript/multilang_de.css

@@ -1,3 +1,3 @@
 :root[lang="de"] .multilang:not([lang="de"]) {
-	display: none;
+  display: none;
 }

app/javascript/multilang_en.css

@@ -1,3 +1,3 @@
 :root[lang="en"] .multilang:not([lang="en"]) {
-	display: none;
+  display: none;
 }

docs/multilang.md

@@ -10,19 +10,19 @@ The implementation of multilanguage support in CodeOcean is inspired by [Moodle'
 
 ## Usage
 
-When making exercise descriptions or tips multilingual, the `.multilang`class must be assigned to all multilingual content. The `lang` attribute must be set to the appropriate locale, e.g. `"en"` or `"de"`. This very simple solution can be applied in many different ways:
+When making exercise descriptions or tips multilingual, the `.multilang` class must be assigned to all multilingual content. The `lang` attribute must be set to the appropriate locale, e. g., `"en"` or `"de"`. This very simple solution can be applied in many different ways:
 
 Example 1 (Separated Multilingual Content Blocks):
 
-```
+```md
 <p class="multilang" lang="de">Implementieren Sie eine Funktion, die für einen gegebenen Parameter entscheidet, ob er gerade oder ungerade ist.</p>
 <p class="multilang" lang="en">Implement a function that decides for a given parameter whether it is even or odd.</p>
 ```
 
 Example 2 (Inline Separation of Multilingual Content):
 
-```
-<p><span class="multilang" lang="de">Implementieren Sie eine Funktion, die für einen gegebenen Parameter entscheidet, ob er gerade oder ungerade ist.</span> <span class="multilang" lang="en">Implement a function that decides for a given parameter whether it is even or odd.</span></p>
+```md
+<p><span class="multilang" lang="de">Implementieren Sie eine Funktion, die für einen gegebenen Parameter entscheidet, ob er gerade oder ungerade ist.</span><span class="multilang" lang="en">Implement a function that decides for a given parameter whether it is even or odd.</span></p>
 ```
 
 This approach also applies to the description of tips, including their example sections.