Fix typos in the documentation

Author: RKrahl

doc/src/advanced.rst

@@ -18,7 +18,7 @@ Consider the following example test module:
 
 In principle, this example works the very same way as the basic
 example for :ref:`usage-parametrized`.  The only difference is that
-the lists of paramters are dynamically compiled beforehand.  The test
+the lists of parameters are dynamically compiled beforehand.  The test
 for child `l` deliberately fails, just to show the effect.  As a
 consequence, the test for its parent `d` will be skipped.
 

doc/src/configuration.rst

@@ -47,7 +47,7 @@ The following command line options are added by pytest.dependency:
    if any of the dependencies has been skipped or failed.
    E.g. dependencies that have not been run at all will be ignored.
 
-   This may be useful if you run only a subset of the testsuite and
+   This may be useful if you run only a subset of the test suite and
    some tests in the selected set are marked to depend on other tests
    that have not been selected.
 

doc/src/usage.rst

@@ -21,7 +21,7 @@ test, we will get the following result:
 .. literalinclude:: ../examples/basic.out
 
 The first test has deliberately been set to fail to illustrate the
-effect.  We will get the following resuts:
+effect.  We will get the following results:
 
 `test_a`
   deliberately fails.