Fix typos in docstrings and documentation

doc/downloaders.rst

@@ -50,7 +50,7 @@ Creating your own downloaders
 
 If your use case is not covered by our downloaders, you can implement your own.
 :meth:`pooch.Pooch.fetch` and :func:`pooch.retrieve` will accept any *callable
-obejct* that has the signature specified above. As an example, consider the
+object* that has the signature specified above. As an example, consider the
 case in which the login credentials need to be provided to a site that is
 redirected from the original download URL:
 

doc/processors.rst

@@ -125,7 +125,7 @@ the ``fname, action, pup`` arguments. Example use cases for this would be:
   size) to a more user friendly format (easy to open and fast to load into
   memory).
 * Add missing metadata to data from public servers. You might be using public
-  data that has known issues (poorly formated entries, missing metadata, etc)
+  data that has known issues (poorly formatted entries, missing metadata, etc)
   which can be fixed when the file is downloaded.
 
 The main advantage to using a processor for these actions is that they are

pooch/hashes.py

@@ -146,7 +146,7 @@ def hash_matches(fname, known_hash, strict=False, source=None):
 
     If the *known_hash* is None, will always return True.
 
-    Coverts hashes to lowercase before comparison to avoid system specific
+    Converts hashes to lowercase before comparison to avoid system specific
     mismatches between hashes in the registry and computed hashes.
 
     Parameters