Update yaml pipe operator

internal/test_helpers/course_definition.yml

@@ -31,7 +31,7 @@ release_status: "alpha"
 #
 # > In this challenge, you'll build a toy Redis clone that's capable of handling basic commands like PING, GET
 # > and SET. Along the way, we'll learn about event loops, the Redis Protocol and more.
-description_md: |
+description_md: |-
   Add a description for your course here.
 
 # This is shown on the catalog. Plaintext only, recommended length ~10 words.
@@ -45,7 +45,7 @@ description_md: |
 # > Learn about TCP servers, the Redis protocol and more
 #
 # **TODO**: Remove _md suffix since markdown isn't supported
-short_description_md: |
+short_description_md: |-
   Add a short description for your course here.
 
 # The percentage of users who complete your course. We'll calculate this automatically in the future, safe to ignore for now.
@@ -89,15 +89,15 @@ marketing:
       author_description: "Senior Software Developer, CenturyLink"
       author_avatar: "https://codecrafters.io/images/external/testimonials/patrick-burris.jpeg"
       link: "https://github.com/Jumballaya"
-      text: |
+      text: |-
         I think the instant feedback right there in the git push is really cool.
         Didn't even know that was possible!
 
 stages:
   - slug: "init"
     name: "Match a literal character"
     difficulty: very_easy
-    description_md: |
+    description_md: |-
       In this stage, we'll handle the simplest regex possible: a single character. 
 
       **Example:** `a` should match "apple", but not "dog".
@@ -112,7 +112,7 @@ stages:
       for metacharacters like `+`, `?` etc.). We'll use this flag in all stages.
 
       You program must [exit](https://en.wikipedia.org/wiki/Exit_status) with 0 if the character is found, and 1 if not.
-    marketing_md: |
+    marketing_md: |-
       In this stage, we'll handle the simplest regex possible: a single character. 
 
       **Example:**