revise special characters exercise

slides/chapter-05.de.md

@@ -339,6 +339,6 @@ Sonderzeichen einfügen
 Kompiliert von nun an immer die Datei `main.tex`, um eure Änderungen im Skript zu sehen (in diesem Fall im Abschnitt „Übung 5“).
 </div>
 
-*	Ersetzt die Leerzeichen innerhalb der Abkürzungen in  `exercises/special-characters.tex` durch **schmale Leerzeichen**. Setzt außerdem ein schmales Leerzeichen vor das *Euro-Zeichen*.
-*	Ersetzt die Bindestriche bei den Öffnungszeiten der ERBA durch **Halbgeviertstriche**. 
+*	Ersetzt die Leerzeichen innerhalb der Abkürzungen in  `exercises/special-characters.tex` durch **schmale Leerzeichen**.
+*	Ersetzt die Bindestriche bei den Öffnungszeiten der ERBA durch **Halbgeviertstriche**, optional mit schmalen Leerzeichen außenrum. 
 *	Setzt beim Wort *Studierendenausweis* eine **ausschließliche Trennstelle** nach *Studierenden-*. 

slides/chapter-05.en.md

@@ -337,6 +337,6 @@ Insert special characters
 From now on, compile the file `main.tex` to see your changes appear in the script itself (in this task, see section “Übung 5”).
 </div>
 
-*	Replace the spaces in `exercises/special-characters.tex` within the abbreviations (“e.&thinsp;g.”, “i.&thinsp;a.”) by **thin spaces**. On top of that, replace the space before the *Euro sign* by a thin space.
-*	Replace the hyphens by a **dash** (`--`). 
+*	Replace the spaces in `exercises/special-characters.tex` within the abbreviations (“e.&thinsp;g.”, “i.&thinsp;a.”) by **thin spaces**.
+*	Replace the hyphens separating the opening hours by **en dashes** (`--`), optionally surrounded by thin spaces. 
 *	Add an **exclusive hyphenation** in the word *Studierendenausweis* after *Studierenden-*.

slides/intro.de.md

@@ -15,6 +15,7 @@ Installing the compiler
 Before starting out with LaTeX, a compiler has to be installed.
 
 The following list gives you exemplary compilers for different operating systems:
+
 * Windows
 * MacOS
 * Ubuntu

slides/intro.en.md

@@ -1,7 +1,7 @@
 @slide(layout=chapter-slide)
 
 @title
-First steps with L<sup style="font-weight: bold; font-size: 73%; margin-left: -.25em; margin-right: -.05em; position: relative; top: .2em">A</sup>T<sub style="font-size: 100%; margin-left: -.1em">E</sub>X
+First steps with&nbsp;L<sup style="font-weight: bold; font-size: 73%; margin-left: -.25em; margin-right: -.05em; position: relative; top: .2em">A</sup>T<sub style="font-size: 100%; margin-left: -.1em">E</sub>X
 
 @content
 In order to compile the script for this tutorial, a few steps have to be followed, which are explained in the next slides.
@@ -9,7 +9,7 @@ In order to compile the script for this tutorial, a few steps have to be followe
 @slide(layout=content-only)
 
 @title
-Digression: Opening a command prompt
+Digression: Opening&nbsp;a&nbsp;command&nbsp;prompt
 
 @content
 * For the following tasks, we are going to need a command prompt
@@ -45,12 +45,12 @@ Installing the editor
 @content
 * An editor can downloaded once the compiler has been installed
 * For editing LaTeX documents, any text editor works fine, e.g., <a href="https://notepad-plus-plus.org/downloads/">Notepad++</a>, <a href="https://code.visualstudio.com/download">VSCode</a>
-* For beginners, <a href="https://www.texstudio.org/">T<sub style="font-size: 100%; margin-left: -.1em">E</sub>Xstudio</a> is recommended due to its LaTex-specific features
+* For beginners, <a href="https://www.texstudio.org/">T<sub style="font-size: 100%; margin-left: -.1em">E</sub>Xstudio</a> is recommended due to its LaTeX-specific features
 * Download and install T<sub style="font-size: 100%; margin-left: -.1em">E</sub>Xstudio
 
 @slide(layout=content-only)
 @title
-Compile the script for the first time
+Compile the script for&nbsp;the&nbsp;first&nbsp;time
 
 @content
 * Download the project archive from the VC.