Add test for orphan fragments with numbers

.gitignore

@@ -17,6 +17,8 @@
 .vs/
 .vscode
 Justfile
+*egg-info/
+towncrier.test.test_*/
 _trial_temp*/
 apidocs/
 dist/

src/towncrier/test/test_build.py

@@ -43,6 +43,14 @@ def _test_command(self, command):
                 f.write("Orphaned feature")
             with open("foo/newsfragments/+xxx.feature", "w") as f:
                 f.write("Another orphaned feature")
+            with open("foo/newsfragments/+123_orphaned.feature", "w") as f:
+                f.write("An orphaned feature starting with a number")
+            with open("foo/newsfragments/+12.3_orphaned.feature", "w") as f:
+                f.write("An orphaned feature starting with a dotted number")
+            with open("foo/newsfragments/+orphaned_123.feature", "w") as f:
+                f.write("An orphaned feature ending with a number")
+            with open("foo/newsfragments/+orphaned_12.3.feature", "w") as f:
+                f.write("An orphaned feature ending with a dotted number")
             # Towncrier ignores files that don't have a dot
             with open("foo/newsfragments/README", "w") as f:
                 f.write("Blah blah")
@@ -73,6 +81,10 @@ def _test_command(self, command):
                 - Baz fix levitation (#2)
                 - Adds levitation (#123)
                 - Extends levitation (#124)
+                - An orphaned feature ending with a dotted number
+                - An orphaned feature ending with a number
+                - An orphaned feature starting with a dotted number
+                - An orphaned feature starting with a number
                 - Another orphaned feature
                 - Orphaned feature