Address review: fix run_model_on_task example, remove unwanted files

- Use HistGradientBoostingClassifier instead of DecisionTreeClassifier
  (fixes ValueError with missing values in task 1)
- Remove .DS_Store
- Remove tests/files/misc/features_with_whitespaces.xml.pkl

Author: Abhishek

.DS_Store

@@ -109,8 +109,8 @@ def run_model_on_task(  # noqa: PLR0913
     --------
     >>> import openml
     >>> import openml_sklearn  # doctest: +SKIP
-    >>> from sklearn.tree import DecisionTreeClassifier  # doctest: +SKIP
-    >>> clf = DecisionTreeClassifier()  # doctest: +SKIP
+    >>> from sklearn.ensemble import HistGradientBoostingClassifier  # doctest: +SKIP
+    >>> clf = HistGradientBoostingClassifier()  # doctest: +SKIP
     >>> task = openml.tasks.get_task(1)  # doctest: +SKIP
     >>> run = openml.runs.run_model_on_task(clf, task)  # doctest: +SKIP
     """

openml/runs/functions.py

@@ -0,0 +1 @@
+org/openml/test

tests/files/localhost_8000 2

@@ -0,0 +1,30 @@
+<oml:data_set_description xmlns:oml="http://openml.org/openml">
+  <oml:id>125</oml:id>
+  <oml:name>longley</oml:name>
+  <oml:version>1</oml:version>
+  <oml:description>**Author**:   
+**Source**: Unknown -   
+**Please cite**:   
+
+Data from StatLib (ftp stat.cmu.edu/datasets)
+
+ The infamous Longley data, &quot;An appraisal of least-squares programs from
+  the point of view of the user&quot;, JASA, 62(1967) p819-841.
+
+ Variables are: Number of people employed   (usually the y variable)
+                GNP implicit price deflator
+                GNP
+                Unemployed
+                Armed forces
+                Non-institutionalized population &gt;=14 years of age
+                Year
+
+ Employment is being treated as the class
+ attribute.</oml:description>
+  <oml:description_version>1</oml:description_version>
+  <oml:format>ARFF</oml:format>
+        <oml:upload_date>2014-04-23T13:17:28</oml:upload_date>
+    <oml:licence>Public</oml:licence>  <oml:url>https://test.openml.org/data/v1/download/125/longley.arff</oml:url>
+    <oml:file_id>125</oml:file_id>  <oml:default_target_attribute>employed</oml:default_target_attribute>      <oml:version_label>1</oml:version_label>    <oml:tag>test_tag_OpenMLDatasetTestOnTestServer_176950496348898</oml:tag><oml:tag>test_tag_OpenMLDatasetTestOnTestServer_17695084341374717</oml:tag><oml:tag>test_tag_OpenMLDatasetTestOnTestServer_17695087605457149</oml:tag><oml:tag>test_tag_OpenMLDatasetTestOnTestServer_1769508973937027</oml:tag><oml:tag>test_tag_OpenMLDatasetTestOnTestServer_17695955071197827</oml:tag><oml:tag>test_tag_OpenMLDatasetTestOnTestServer_17703991724470294</oml:tag>  <oml:visibility>public</oml:visibility>        <oml:status>active</oml:status>
+  <oml:processing_date>2026-01-20 10:46:42</oml:processing_date>      <oml:md5_checksum>a6d46686d199b6cb82dbdf0e34377b8a</oml:md5_checksum>
+</oml:data_set_description>