Update CONTRIBUTING.rst to include correct Makefile targets.
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 472bddaf42..bc25810f4d 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -47,7 +47,7 @@ Go to https://github.com/jakubroztocil/httpie and fork the project repository.
 
     # Install dev. requirements and also HTTPie (in editable mode
     # so that the `http' command will point to your working copy):
-    make
+    make init
 
 
 Making Changes
@@ -71,12 +71,9 @@ Running all tests:
 
 .. code-block:: bash
 
-    # Run all tests on the current Python interpreter
+    # Run all tests on the current Python interpreter with coverage
     make test
 
-    # Run all tests on the current Python with coverage
-    make test-cover
-
     # Run all tests in all of the supported and available Pythons via Tox
     make test-tox
 

Hi, I'm just getting started with developing on HTTPie. I was going
through the contributing guide and noticed that a couple of the `make`
commands seem a little stale.