Allow leading spaces in the stopwords configuration

The stopwords.txt does not allow leading spaces, but the registry
pads it up because of the way we define it in the xml.

CHANGES.rst

@@ -4,7 +4,7 @@ Changelog
 9.2.2 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Allow leading spaces in the stopwords configuration [reebalazs]
 
 
 9.2.1 (2024-02-01)

src/collective/solr/stopword.py

@@ -2,7 +2,7 @@
 
 from collective.solr.utils import getConfig
 
-reLine = re.compile(r"^([A-Za-zÀ-ÖØ-öø-ÿ]*)")
+reLine = re.compile(r"^\s*([A-Za-zÀ-ÖØ-öø-ÿ]*)")
 
 raw = None
 raw_case_insensitive = None

src/collective/solr/tests/test_stopwords.py

@@ -130,3 +130,19 @@ def testComments(self):
         self.assertTrue(isStopWord("stopone", self.config))
         self.assertTrue(isStopWord("stoptwo", self.config))
         self.assertTrue(isStopWord("stopthree", self.config))
+
+    def testLeadingSpaces(self):
+        # stopwords.txt does not allow leading spaces, but the registry
+        # pads it up because of the way we define it in the xml.
+        self.config.stopwords = (
+            """
+  stopone
+    stoptwo
+"""
+            + "   \n"
+        )
+        self.assertFalse(isStopWord("", self.config))
+        self.assertFalse(isStopWord("  ", self.config))
+        self.assertFalse(isStopWord("    ", self.config))
+        self.assertTrue(isStopWord("stopone", self.config))
+        self.assertTrue(isStopWord("stoptwo", self.config))