Update python/tskit/tables.py

Co-authored-by: Peter Ralph <petrel.harp@gmail.com>

Author: hyanwong

python/tskit/tables.py

@@ -4029,7 +4029,7 @@ def concatenate(
         """
         Concatenate another table collection to the right of this one. This {meth}`shift`s the
         other table coordinate rightwards, then calls {meth}`union` with
-        the provided ``node_mapping``. If no node mapping is give, the two table
+        the provided ``node_mapping``. If no node mapping is given, the two table
         collections must have the same number of samples, and those are treated
         (in numerical order) as shared between the two table collections.
         This is identical to :meth:`TreeSequence.concatenate` but