fixing small typo in docstring
@@ -405,7 +405,7 @@ def coalesce_menisci(invaded_image, dt=None):
The image produced by the ``porosimetry`` function
dt : ND-image (optional)
- The distance transform of the pore phase. If this is not provide, it
+ The distance transform of the pore phase. If this is not provided it
will be calcualted, so providing one can save time.
returns
