Fixed #562 Added parameter atol to motifs/_motifs and docstring (#564)

* add description of parameter atol to docstring

* pass parameter atol to _motifs

Author: NimaSarajpoor

stumpy/motifs.py

@@ -217,6 +217,10 @@ def motifs(
     max_motifs : int, default 1
         The maximum number of motifs to return
 
+    atol : float, default 1e-8
+        The absolute tolerance parameter. This value will be added to `max_distance`
+        when comparing distances between subsequences.
+
     normalize : bool, default True
         When set to `True`, this z-normalizes subsequences prior to computing distances.
         Otherwise, this function gets re-routed to its complementary non-normalized
@@ -299,6 +303,7 @@ def motifs(
         cutoff,
         max_matches,
         max_motifs,
+        atol=atol,
     )
 
     return motif_distances, motif_indices