Spelling and punctuation fixes

Author: takluyver

doc/pyproject_toml.rst

@@ -420,9 +420,9 @@ Exclusions have priority over inclusions.
 .. note::
 
    If you are not using :ref:`build_cmd` but  ``flit_core`` via another build
-   frontend Flit doesn't doesn't check the VCS for files to include but instead
+   frontend, Flit doesn't doesn't check the VCS for files to include but instead
    builds a 'minimal' sdist (which includes the files necessary to build a wheel).
-   You'll have to adaopt your inclusion/exclusion rules to achieve the same result
+   You'll have to adapt your inclusion/exclusion rules to achieve the same result
    as you'd get with :ref:`build_cmd`.