Fix markdown

Author: richelbilderbeek

.markdownlintignore

@@ -1,3 +1,6 @@
 docs/index.md
 docs/software/software-table.md
 evaluations/**/*_feedback.md
+docs/shared_documents/*
+docs/social_coding/not_used/*
+docs/meeting_notes/*

docs/lesson_plans/2024_autumn/20241121_richel.md

@@ -43,7 +43,7 @@ Great!
 
 I've made the schedule to this:
 
-```
+```text
 Thursday |09:00-10:00|Lars   |[Object-oriented design](design_develop/OO_development.md)
 Thursday |10:15-11:00|Richel |[Function design](function_design/README.md)
 Thursday |11:15-12:00|Richel |[Class design](data_structures/class_design.md), [has-a relation](data_structures/has_a_relation.md), [expressive data type](data_structures/expressive_data_type.md)
@@ -66,7 +66,7 @@ Yes, rearrange to:
 
 Changed schedule to:
 
-```
+```text
 Thursday |09:00-10:00|Lars   |[Object-oriented design](design_develop/OO_development.md)
 Thursday |10:15-11:00|Richel |[Function design](function_design/README.md)
 Thursday |11:15-12:00|Richel |[Expressive data type](data_structures/expressive_data_type.md), [has-a relation](data_structures/has_a_relation.md)
@@ -101,7 +101,7 @@ So, here is a schedule to fix this
 I need to suggest a different schedule to Lars, which consists of switching
 the order of things:
 
-```
+```text
 4. Thursday |09:00-10:00|Lars   |[Object-oriented design](design_develop/OO_development.md)
 1. Thursday |10:15-11:00|Richel |[Function design](function_design/README.md)
 2. Thursday |11:15-12:00|Richel |[Expressive data type](data_structures/expressive_data_type.md),