BUG: pandas.cut and negative values #14652

Fix issue #14652

Author: luca-s

pandas/tools/tile.py

@@ -98,8 +98,8 @@ def cut(x, bins, right=True, labels=None, retbins=False, precision=3,
         mn, mx = [mi + 0.0 for mi in rng]
 
         if mn == mx:  # adjust end points before binning
-            mn -= .001 * mn
-            mx += .001 * mx
+            mn -= .001 * abs(mn)
+            mx += .001 * abs(mx)
             bins = np.linspace(mn, mx, bins + 1, endpoint=True)
         else:  # adjust end points after binning
             bins = np.linspace(mn, mx, bins + 1, endpoint=True)