Fix hg file finder in presence of white space in paths

Author: sbidoul

setuptools_scm/file_finder_hg.py

@@ -25,7 +25,7 @@ def _hg_ls_files_and_dirs(toplevel):
     out = subprocess.check_output([
         'hg', 'files',
     ], cwd=toplevel, universal_newlines=True)
-    for name in out.split():
+    for name in out.splitlines():
         name = os.path.normcase(name).replace('/', os.path.sep)
         fullname = os.path.join(toplevel, name)
         hg_files.add(fullname)

testing/test_file_finder.py

@@ -51,6 +51,15 @@ def test_basic(inwd):
     })
 
 
+def test_whitespace(inwd):
+    (inwd.cwd / 'adir' / 'space file').ensure(file=True)
+    inwd.add_and_commit()
+    assert set(find_files('adir')) == _sep({
+        'adir/space file',
+        'adir/filea',
+    })
+
+
 def test_case(inwd):
     (inwd.cwd / 'CamelFile').ensure(file=True)
     (inwd.cwd / 'file2').ensure(file=True)