Update 'Exercise Anatomy' in CONTRIBUTING.md

docs/CONTRIBUTING.md

@@ -77,40 +77,36 @@ clang-format -i $(file)
 
 ## Exercise anatomy
 
-Each exercise should be contained in a directory `c/exercises/{exercise-name}`.
+Each exercise should be contained in a directory `c/exercises/practice/{exercise-name}`.
 See [implement-an-exercise-from-specification][] for in depth details on implementing an exercise that matches the specification
 
-The structure of en exercise directory is as follows (note the differing hyphen and underscore usage for directory names and file names respectively):
+The structure of an exercise directory is as follows (note the differing hyphen and underscore usage for directory names and file names respectively):
 
 ```text
 +-- {exercise-name}
     +-- makefile
-    +-- README.md
-    +-- src
-    |   +-- example.c
-    |   +-- example.h | {exercise_name}.h
-    +-- test
-        +-- test_{exercise_name}.c
-        +-- vendor
-            +-- unity.c
-            +-- unity.h
-            +-- unity_internals.h
+    +-- {exercise-name}.c
+    +-- {exercise-name}.h
+    +-- test_{exercise-name}.c
+    +-- test-framework
+    |   +-- unity.c
+    |   +-- unity.h
+    |   +-- unity_internals.h
 ```
 
-* `test` - contains the test file `test_{exercise_name}.c` and a `vendor` directory containing the test harness [Unity][] from [ThrowTheSwitch][].
-  ThrowTheSwitch has a decent guide on [getting started with Unity][] should you desire a tutorial.
-  The version of Unity used is indicated in [versions][]. The layout of the test file is described in the [style guide][test-file-layout].
-  Tests should be written that satisfy `canonical-data.json` file for the exercise in the [problem-specifications][] repository
-* `src` - contains the example files `example.c` and `example.h`.
-  These are both skipped by the `exercism` CLI when downloading to the client, so it is imperative that you do not reference the names of the files in your code.
-  If you need to provide a header file example that is necessary to run your tests it should be named `{my_exercise}.h` instead.
-  Please also use [include guards][] in your header files.
-  The exercise tests can be run using `make` from the repository root.
-  The top-level makefile will rename the `example.{c|h}` files accordingly (use `make help` to learn about individual targets).
-* `makefile` - is the makefile for the exercise as it would build using proper filenames (i.e. `{exercise_name}.c` and `{exercise_name}.h` instead of `example.c` and `example.h` respectively).
-  Makefiles are expected to change very little between exercises so it should be easy to copy one from another exercise.
-* `README.md` - is the readme that relates to the exercise.
-  These can be generated by the [configlet][] tool from `description.md` for the exercise in the [problem-specifications][] repository, or alternatively a custom one can be written.
+`test_{exercise_name}.c` - This file contains all the tests for the exercise.  
+`test-framework` - directory containing the test harness [Unity][] from [ThrowTheSwitch][].  
+  ThrowTheSwitch has a decent guide on [getting started with Unity][] should you desire a tutorial.  
+  The version of Unity used is indicated in [versions][]. The layout of the test file is described in the [style guide][test-file-layout].  
+  Tests should be written to satisfy `canonical-data.json` file for the exercise in the [problem-specifications][] repository  
+`{exercise-name}.c` / `{exercise-name}.h` - The exercise's source files.  
+  Please use [include guards][] in your header files.
+  The exercise tests can be run using `make test` from the repository root.
+* `makefile` - is the makefile for the exercise as it would build.  
+Two rules are required,  
+test: compile test_{exercise-name}.c and run it.
+memcheck: compile test_{exercise-name} with -fsanitize=address, -fno-common, -fno-omit-frame-pointer flag and run it
+Makefiles are expected to change very little between exercises so it should be easy to copy one from another exercise.
 
 **Don't forget** to add the exercise to the track's `config.json`. For this you will need to determine the best place to add the exercise within the order of all other track exercises. You will also need to generate a UUID to add here. For both of these tasks you can use the [configlet][] tool; the tool will even lint and format the `config.json` for you after you've made these changes!