Tweak docs and comments [skip ci]

Author: jg-rp

docs/pointers.md

@@ -58,20 +58,20 @@ from jsonpath import JSONPointer
 example_data = {"foo": {"bar": [1, 2, 3]}, "baz": False}
 
 pointer = JSONPointer("/foo/bar/0")
-print(pointer.exists())  # True
+print(pointer.exists(example_data))  # True
 
 pointer = JSONPointer("/foo/bar/9")
-print(pointer.exists())  # False
+print(pointer.exists(example_data))  # False
 
 pointer = JSONPointer("/baz")
-print(pointer.exists())  # True
+print(pointer.exists(example_data))  # True
 ```
 
 ## `join(*parts)`
 
 **_New in version 0.9.0_**
 
-Join this pointer with _parts_. Each part is expected to be a JSON Pointer string, possibly without a leading slash. If a part does have a leading slash, the previous pointer is ignored and a new `JSONPath` is created, and processing of remaining parts continues.
+Join this pointer with _parts_. Each part is expected to be a JSON Pointer string, possibly without a leading slash. If a part does have a leading slash, the previous pointer is ignored and a new `JSONPointer` is created, and processing of remaining parts continues.
 
 `join()` is equivalent to using the slash (`/`) operator for each argument.
 

jsonpath/patch.py

@@ -501,7 +501,7 @@ def test(self: Self, path: Union[str, JSONPointer], value: object) -> Self:
         Arguments:
             path: A string representation of a JSON Pointer, or one that has
                 already been parsed.
-            value: The object to add.
+            value: The object to test.
 
         Returns:
             This `JSONPatch` instance, so we can build a JSON Patch by chaining

jsonpath/pointer.py

@@ -257,7 +257,7 @@ def from_match(
         match: JSONPathMatch,
     ) -> JSONPointer:
         """Return a JSON Pointer for the path from a JSONPathMatch instance."""
-        # A rfc6901 string representation of match.parts.
+        # An RFC 6901 string representation of match.parts.
         if match.parts:
             pointer = cls._encode(match.parts)
         else:
@@ -403,7 +403,7 @@ def join(self, *parts: str) -> JSONPointer:
 
         Each part is expected to be a JSON Pointer string, possibly without a
         leading slash. If a part does have a leading slash, the previous
-        pointer is ignored and a new `JSONPath` is created, and processing of
+        pointer is ignored and a new `JSONPointer` is created, and processing of
         remaining parts continues.
         """
         pointer = self