unstage changes to _modidx.py

Author: ddobrinskiy

fastcore/_modidx.py

@@ -594,4 +594,4 @@
                                 'fastcore.xtras.truncstr': ('xtras.html#truncstr', 'fastcore/xtras.py'),
                                 'fastcore.xtras.untar_dir': ('xtras.html#untar_dir', 'fastcore/xtras.py'),
                                 'fastcore.xtras.utc2local': ('xtras.html#utc2local', 'fastcore/xtras.py'),
-                                'fastcore.xtras.walk': ('xtras.html#walk', 'fastcore/xtras.py')}}}
+                                'fastcore.xtras.walk': ('xtras.html#walk', 'fastcore/xtras.py')}}}