chore(deps): update dependency pytest to v9

Rye had ruff built in for formatting, but now with uv we need to add
black ourselves.

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 ### Changed
 - New AGROVOC REST API URL
+- Use urllib from Python stdlib instead of manual replacement for unquoting URLs
 
 ## [0.7.0] - 2025-01-31
 ### Added

pyproject.toml

@@ -45,10 +45,11 @@ build-backend = "uv_build"
 
 [dependency-groups]
 dev = [
-    "pytest~=8.3",
+    "pytest~=9.0",
     "isort~=6.0",
     "csvkit~=2.0",
     "ipython~=8.31",
+    "black~=25.9",
 ]
 
 [tool.isort]

src/csv_metadata_quality/fix.py

@@ -3,6 +3,7 @@
 import logging
 import re
 from unicodedata import normalize
+from urllib.parse import unquote
 
 import country_converter as coco
 import pandas as pd
@@ -451,12 +452,8 @@ def normalize_dois(field):
         if match:
             new_value = re.sub(pattern, "doi.org", new_value)
 
-        # Convert erroneous %2f to /
-        pattern = re.compile("%2f")
-        match = re.findall(pattern, new_value)
-
-        if match:
-            new_value = re.sub(pattern, "/", new_value)
+        # Replace %xx escapes with their single-character equivalent.
+        new_value = unquote(new_value)
 
         # Replace values like doi: 10.11648/j.jps.20140201.14
         pattern = re.compile(r"^doi: 10\.")