matplotlib
diff --git a/‎doc/api/next_api_changes/2018-02-15-AL-deprecations.rst
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diff --git a/‎doc/api/next_api_changes/2018-03-23-AL.rst
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diff --git a/‎lib/matplotlib/__init__.py
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diff --git a/‎lib/matplotlib/cbook/__init__.py
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diff --git a/‎lib/matplotlib/font_manager.py
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diff --git a/‎tools/triage_tests.py
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+4-10Lines changed: 4 additions & 10 deletions b/‎tools/triage_tests.py
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@@ -13,7 +13,7 @@ The following classes, methods, functions, and attributes are deprecated:
 - ``Annotation.arrow``,
 - ``cbook.GetRealpathAndStat``, ``cbook.Locked``,
 - ``cbook.is_numlike`` (use ``isinstance(..., numbers.Number)`` instead),
-  ``cbook.unicode_safe``
+  ``cbook.listFiles``, ``cbook.unicode_safe``
 - ``container.Container.set_remove_method``,
 - ``dates.DateFormatter.strftime_pre_1900``, ``dates.DateFormatter.strftime``,
 - ``font_manager.TempCache``,
 
@@ -0,0 +1,4 @@
+``font_manager.list_fonts`` now follows the platform's casefolding semantics
+````````````````````````````````````````````````````````````````````````````
+
+i.e., it behaves case-insensitively on Windows only.
@@ -743,14 +743,11 @@ def _get_data_path_cached():
 
 
 def get_py2exe_datafiles():
-    datapath = get_data_path()
-    _, tail = os.path.split(datapath)
+    data_path = Path(get_data_path())
     d = {}
-    for root, _, files in os.walk(datapath):
-        files = [os.path.join(root, filename) for filename in files]
-        root = root.replace(tail, 'mpl-data')
-        root = root[root.index('mpl-data'):]
-        d[root] = files
+    for path in filter(Path.is_file, data_path.glob("**/*")):
+        (d.setdefault(str(path.parent.relative_to(data_path.parent)), [])
+         .append(str(path)))
     return list(d.items())
 
 
 
@@ -676,6 +676,7 @@ def dedent(s):
     return result
 
 
+@deprecated("3.0")
 def listFiles(root, patterns='*', recurse=1, return_folders=0):
     """
     Recursively list files
 
@@ -35,6 +35,7 @@
 from functools import lru_cache
 import json
 import os
+from pathlib import Path
 import subprocess
 import sys
 from threading import Timer
@@ -150,12 +151,13 @@ def get_fontext_synonyms(fontext):
 
 def list_fonts(directory, extensions):
     """
-    Return a list of all fonts matching any of the extensions,
-    possibly upper-cased, found recursively under the directory.
+    Return a list of all fonts matching any of the extensions, found
+    recursively under the directory.
     """
-    pattern = ';'.join(['*.%s;*.%s' % (ext, ext.upper())
-                        for ext in extensions])
-    return cbook.listFiles(directory, pattern)
+    extensions = ["." + ext for ext in extensions]
+    return [str(path)
+            for path in filter(Path.is_file, Path(directory).glob("**/*.*"))
+            if path.suffix in extensions]
 
 
 def win32FontDirectory():
@@ -231,21 +233,13 @@ def win32InstalledFonts(directory=None, fontext='ttf'):
 
 
 def OSXInstalledFonts(directories=None, fontext='ttf'):
-    """
-    Get list of font files on OS X - ignores font suffix by default.
-    """
+    """Get list of font files on OS X."""
     if directories is None:
         directories = OSXFontDirectories
-
-    fontext = get_fontext_synonyms(fontext)
-
-    files = []
-    for path in directories:
-        if fontext is None:
-            files.extend(cbook.listFiles(path, '*'))
-        else:
-            files.extend(list_fonts(path, fontext))
-    return files
+    return [path
+            for directory in directories
+            for ext in get_fontext_synonyms(fontext)
+            for path in list_fonts(directory, ext)]
 
 
 @lru_cache()
 
@@ -329,16 +329,10 @@ def find_failing_tests(result_images, source):
     Find all of the failing tests by looking for files with
     `-failed-diff` at the end of the basename.
     """
-    entries = []
-    for root, dirs, files in os.walk(result_images):
-        for fname in files:
-            basename, ext = os.path.splitext(fname)
-            if basename.endswith('-failed-diff'):
-                path = os.path.join(root, fname)
-                entry = Entry(path, result_images, source)
-                entries.append(entry)
-    entries.sort(key=lambda x: x.name)
-    return entries
+    return sorted(
+        (Entry(path, result_images, source)
+         for path in Path(result_images).glob("**/*-failed-diff.*")),
+        key=lambda x: x.name)
 
 
 def launch(result_images, source):