Improve Nominatim.search docstring
`view_box` -> `viewbox` plus proper markup
Specify what `viewbox` actually does
@@ -204,11 +204,13 @@ class Nominatim(Geocoder):
:type viewbox: list or tuple of 2 items of :class:`geopy.point.Point` or
``(latitude, longitude)`` or ``"%(latitude)s, %(longitude)s"``.
- :param viewbox: Coordinates to restrict search within.
+ :param viewbox: Prefer this area to find search results. By default this is
+ treated as a hint, if you want to restrict results to this area,
+ specify ``bounded=True`` as well.
Example: ``[Point(22, 180), Point(-22, -180)]``.
:param bool bounded: Restrict the results to only items contained
- within the bounding view_box.
+ within the bounding ``viewbox``.
:param str featuretype: If present, restrict results to certain type of features.
Allowed values: `country`, `state`, `city`, `settlement`.
