address review comments

Signed-off-by: Filipe Laíns <lains@riseup.net>

peps/pep-0739.rst

@@ -31,8 +31,8 @@ This PEP only defines a standard format for a file describing Python
 installations, distributing such files is out of scope.
 
 Python implementations may choose to include a self-describing file as part of
-their distribution, but they are not required to, and it out of scope for this
-PEP to define how that may happen, if they decide to do so.
+their distribution, but they are not required to, and it is out of scope for
+this PEP to define how that may happen, if they decide to do so.
 
 
 Specification
@@ -71,7 +71,8 @@ Subsection with details related to the language specification.
 ------------------
 
 Subsection with details related to Python implementation. Usually, this section
-should be roghly equivalent to :py:data:`sys.implementation`.
+is implementation-defined, but it is recommended to make it roughly equivalent
+to :py:data:`sys.implementation`.
 
 ``name``
 ~~~~~~~~