minor changes

Author: asmirnov69

docs/tracing_ext.md

@@ -1,11 +1,11 @@
 # method_call_ctx_factory - tracing extention of pandas_flavor
 
 `method_call_ctx_factory` global var defined in [pandas_flavor/register.py](https://github.com/pyjanitor-devs/pandas_flavor/blob/c60bfd43adbcc304b3455055af73ed9fc9ac10d1/pandas_flavor/register.py#L8) is used
-as an extention to allow registered method to be traced.
+to allow the methods registered via `pandas_flavors` to be traced.
 
-Default value of `method_call_ctx_factory` is None. 
+Default value of `method_call_ctx_factory` is None.
 
-Starting version 0.5.0 `pandas_flavor` implements the way to pass registerd method name, signature and parameters to
+Starting version 0.5.0 `pandas_flavor` implements the way to pass registered method name, signature and parameters to
 be handled by user-defined object when the call is made. To allow this the user of pandas_flavor must set 
 `method_call_ctx_factory` to refer to function with signature `(method_name: str, method_args: list, method_kwargs: dict) -> tracing_ctx`.
 `tracing_ctx` should be class which implements methods with signatures as below:
@@ -29,4 +29,4 @@ So `handle_start_method_call` and `handle_end_method_call` will have the chance
 Aslo, __exit__ method will be called if any exception would occur. This way it is possible to handle the situation of 
 actual method ends by raising exception.
 
-The example of tracer class implementation and factory function registration is given in [tracing_ext-demo.py...](...)
+The example of tracer class implementation and factory function registration is given in [tracing_ext-demo.py](/docs/tracing_ext-demo.py)