fix: ScannerImpl - possibleSimpleKeys must be LinkedHashMap
diff --git a/src/main/java/org/yaml/snakeyaml/scanner/ScannerImpl.java b/src/main/java/org/yaml/snakeyaml/scanner/ScannerImpl.java
index 22632ab..687ea2f 100644
--- a/src/main/java/org/yaml/snakeyaml/scanner/ScannerImpl.java
+++ b/src/main/java/org/yaml/snakeyaml/scanner/ScannerImpl.java
@@ -519,7 +519,7 @@
// Reset simple keys.
removePossibleSimpleKey();
this.allowSimpleKey = false;
- this.possibleSimpleKeys = new HashMap<Integer, SimpleKey>();
+ this.possibleSimpleKeys.clear();
// Read the token.
Mark mark = reader.getMark();