#2634: clarify meaning of env parameter to spawn/exec*e.
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 98d0cf9..0790f64 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -1464,7 +1464,8 @@
For :func:`execle`, :func:`execlpe`, :func:`execve`, and :func:`execvpe` (note
that these all end in "e"), the *env* parameter must be a mapping which is
- used to define the environment variables for the new process; the :func:`execl`,
+ used to define the environment variables for the new process (these are used
+ instead of the current process' environment); the functions :func:`execl`,
:func:`execlp`, :func:`execv`, and :func:`execvp` all cause the new process to
inherit the environment of the current process. Availability: Macintosh, Unix,
Windows.
@@ -1733,7 +1734,8 @@
For :func:`spawnle`, :func:`spawnlpe`, :func:`spawnve`, and :func:`spawnvpe`
(note that these all end in "e"), the *env* parameter must be a mapping
- which is used to define the environment variables for the new process; the
+ which is used to define the environment variables for the new process (they are
+ used instead of the current process' environment); the functions
:func:`spawnl`, :func:`spawnlp`, :func:`spawnv`, and :func:`spawnvp` all cause
the new process to inherit the environment of the current process.