YamlParser fails print idempotency for values containing :@a@

[Laurens-W]

What's changed?

Added a testcase for a short piece of yaml that should be parsed correctly (Spring Boot correctly interprets this)

What's your motivation?

Ran into an issue where the application.yaml isn't parsed because of a file reference that uses @project.basedir@

Anything in particular you'd like reviewers to focus on?

Is this valid yaml?

Anyone you would like to review specifically?

@timtebeek

Have you considered any alternatives or workarounds?

Referring to the file as a classpath resource works like a charm

Any additional context

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

Still fails with these two failures on that last two tests added.

diff --git a/file.yaml b/file.yaml
index 9e749ca..3812502 100644
--- a/file.yaml
+++ b/file.yaml
@@ -1 +1 @@ 
-a: b:@c@d
\ No newline at end of file
+a: b:f73fe741-95d9-479a-9829-235836e2a6e2
\ No newline at end of file

diff --git a/file.yaml b/file.yaml
index 649c05f..47d68eb 100644
--- a/file.yaml
+++ b/file.yaml
@@ -1 +1 @@ 
-a: 'b:@c@d'
\ No newline at end of file
+a: 'b:3002553c-c619-48c3-a1b6-c2d70f833700d'
\ No newline at end of file