Handle non-standard capitalizations of Unreleased

CHANGELOG.md

@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Properly handle non-standard capitalizations of `Unreleased`
+
 ## [1.0.2] - 2024-10-18
 
 ### Changed

bumpchanges/changelog.py

@@ -189,6 +189,17 @@ def from_tokens(cls, tokens):
             )
             kwargs["version_str"] = kwargs["version_str"][1:]
 
+        # Correctly case `Unreleased`
+        if (
+            kwargs["version_str"] != cls.UNRELEASED_VERSION
+            and kwargs["version_str"].lower() == cls.UNRELEASED_VERSION.lower()
+        ):
+            logging.getLogger(__name__).warning(
+                "Case-correcting Changelog version `%s`",
+                kwargs["version_str"],
+            )
+            kwargs["version_str"] = cls.UNRELEASED_VERSION
+
         # The rest of the tokens should be the lists. Strip any rulers now.
         tokens = [token for token in tokens[3:] if token.type != "hr"]
 

tests/resources/original.md

@@ -6,7 +6,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ---
 
-## Unreleased
+## unreleased
 
 ### Added