closes bpo-41723: Fix an error in the py_compile documentation. (GH-22110)

diff --git a/Doc/library/py_compile.rst b/Doc/library/py_compile.rst
index 9b5c8ee..4fba4cb 100644
--- a/Doc/library/py_compile.rst
+++ b/Doc/library/py_compile.rst
@@ -35,7 +35,7 @@
    in ``.pyc``.
    For example, if *file* is ``/foo/bar/baz.py`` *cfile* will default to
    ``/foo/bar/__pycache__/baz.cpython-32.pyc`` for Python 3.2.  If *dfile* is
-   specified, it is used as the name of the source file in error messages when
+   specified, it is used as the name of the source file in error messages
    instead of *file*.  If *doraise* is true, a :exc:`PyCompileError` is raised
    when an error is encountered while compiling *file*. If *doraise* is false
    (the default), an error string is written to ``sys.stderr``, but no exception