Remove spaces from directories.

03.M3P2 pedagogy/frontmatter.yaml → 02.m3p2-objectives/frontmatter.yaml

 # This page configuration is shared by all locales, in this directory.
 # You can override it in the individual frontmatter of the pages.
 
+visible: true
+
 content:
     # https://learn.getgrav.org/15/content/collections#summary-of-collection-options
     items: @self.children

02.M3P2 objectives/textbook.en.md → 02.m3p2-objectives/textbook.en.md

 ---
 title: 'M3P2 <br>Objectives'
-slug: m3p2_objectives
-visible: true
+slug: m3p2-objectives
 ---
 
 #### What M3P2 is ?

02.M3P2 objectives/textbook.es.md → 02.m3p2-objectives/textbook.es.md

 ---
 title: 'M3P2 <br>Objectivos'
-slug: m3p2_objectives
-visible: true
+slug: m3p2-objectives
 ---
 
 #### ¿ Qué es M3P2 ?

02.M3P2 objectives/textbook.fr.md → 02.m3p2-objectives/textbook.fr.md

 ---
 title: 'M3P2 <br>Objectifs'
-slug: m3p2_objectives
-visible: true
+slug: m3p2-objectives
 ---
 
 #### Qu'est-ce M3P2 ?

03.M3P2 pedagogy/topics.en.md

----
-title: 'Pedagogical<br> method'
-slug: m3p2_pedagogy
----
-
-### The pedagogical method
\ No newline at end of file

03.M3P2 pedagogy/topics.es.md

----
-title: 'Método<br> pedagógico'
-slug: m3p2_pedagogy
----
-
-### El método pedagógico
\ No newline at end of file

03.M3P2 pedagogy/topics.fr.md

----
-title: 'Méthode<br> pédagogique'
-slug: m3p2_pedagogy
----
-
-### La méthode pédagogique
\ No newline at end of file

03.m3p2-pedagogy/topics.en.md

+---
+title: 'Pedagogical<br>method'
+slug: m3p2-pedagogy
+---
+
+### The pedagogical method
\ No newline at end of file

03.m3p2-pedagogy/topics.es.md

+---
+title: 'Método<br>pedagógico'
+slug: m3p2-pedagogy
+---
+
+### El método pedagógico
\ No newline at end of file

03.m3p2-pedagogy/topics.fr.md

+---
+title: 'Méthode<br>pédagogique'
+slug: m3p2-pedagogy
+---
+
+### La méthode pédagogique
\ No newline at end of file