Tokenizer to_disk and from_disk now ensure paths (#5116)

* Tokenizer to_disk and from_disk now ensure strings are converted to paths

Fixes #5115

* Sign contributor agreement

.github/contributors/mabraham.md

@@ -0,0 +1,89 @@
+
+
+## Contributor Agreement
+
+1. The term "contribution" or "contributed materials" means any source code,
+object code, patch, tool, sample, graphic, specification, manual,
+documentation, or any other material posted or submitted by you to the project.
+
+2. With respect to any worldwide copyrights, or copyright applications and
+registrations, in your contribution:
+
+    * you hereby assign to us joint ownership, and to the extent that such
+        assignment is or becomes invalid, ineffective or unenforceable, you hereby
+            grant to us a perpetual, irrevocable, non-exclusive, worldwide, no-charge,
+                royalty-free, unrestricted license to exercise all rights under those
+                    copyrights. This includes, at our option, the right to sublicense these same
+                        rights to third parties through multiple levels of sublicensees or other
+                            licensing arrangements;
+
+    * you agree that each of us can do all things in relation to your
+        contribution as if each of us were the sole owners, and if one of us makes
+            a derivative work of your contribution, the one who makes the derivative
+                work (or has it made will be the sole owner of that derivative work;
+
+    * you agree that you will not assert any moral rights in your contribution
+        against us, our licensees or transferees;
+
+    * you agree that we may register a copyright in your contribution and
+        exercise all ownership rights associated with it; and
+
+    * you agree that neither of us has any duty to consult with, obtain the
+        consent of, pay or render an accounting to the other for any use or
+            distribution of your contribution.
+
+3. With respect to any patents you own, or that you can license without payment
+to any third party, you hereby grant to us a perpetual, irrevocable,
+non-exclusive, worldwide, no-charge, royalty-free license to:
+
+    * make, have made, use, sell, offer to sell, import, and otherwise transfer
+        your contribution in whole or in part, alone or in combination with or
+            included in any product, work or materials arising out of the project to
+                which your contribution was submitted, and
+
+    * at our option, to sublicense these same rights to third parties through
+        multiple levels of sublicensees or other licensing arrangements.
+
+4. Except as set out above, you keep all right, title, and interest in your
+contribution. The rights that you grant to us under these terms are effective
+on the date you first submitted a contribution to us, even if your submission
+took place before the date you sign these terms.
+
+5. You covenant, represent, warrant and agree that:
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+    * Each contribution that you submit is and shall be an original work of
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+    * to the best of your knowledge, each contribution will not violate any
+        third party's copyrights, trademarks, patents, or other intellectual
+            property rights; and
+
+    * each contribution shall be in compliance with U.S. export control laws and
+        other applicable export and import laws. You agree to notify us if you
+            become aware of any circumstance which would make any of the foregoing
+                representations inaccurate in any respect. We may publicly disclose your
+                    participation in the project, including the fact that you have signed the SCA.
+
+6. This SCA is governed by the laws of the State of California and applicable
+U.S. Federal law. Any choice of law rules will not apply.
+
+7. Please place an “x” on one of the applicable statement below. Please do NOT
+mark both statements:
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+    * [x] I am signing on behalf of myself as an individual and no other person
+        or entity, including my employer, has or will have rights with respect to my
+            contributions.
+
+    * [ ] I am signing on behalf of my employer or a legal entity and I have the
+        actual authority to contractually bind that entity.
+
+## Contributor Details
+
+| Field                          | Entry                |
+|------------------------------- | -------------------- |
+| Name                           |                      |
+| Company name (if applicable)   |                      |
+| Title or role (if applicable)  |                      |
+| Date                           |                      |
+| GitHub username                |                      |
+| Website (optional)             |                      |

spacy/tokenizer.pyx

@@ -508,6 +508,7 @@ cdef class Tokenizer:
 
         DOCS: https://spacy.io/api/tokenizer#to_disk
         """
+        path = util.ensure_path(path)
         with path.open("wb") as file_:
             file_.write(self.to_bytes(**kwargs))
 
@@ -521,6 +522,7 @@ cdef class Tokenizer:
 
         DOCS: https://spacy.io/api/tokenizer#from_disk
         """
+        path = util.ensure_path(path)
         with path.open("rb") as file_:
             bytes_data = file_.read()
         self.from_bytes(bytes_data, **kwargs)