emacs-27 520fd3e: * lisp/env.el (substitute-env-vars): Doc fix. (Bug#40948)

[Eli Zaretskii]

branch: emacs-27
commit 520fd3e728d46702a04f6a19f23ed64a66900d51
Author: Eli Zaretskii <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    * lisp/env.el (substitute-env-vars): Doc fix.  (Bug#40948)
---
 lisp/env.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/env.el b/lisp/env.el
index ca2a977..c2cf088 100644
--- a/lisp/env.el
+++ b/lisp/env.el
@@ -68,7 +68,7 @@ with a character not a letter, digit or underscore; 
otherwise, enclose
 the entire variable name in braces.  For instance, in `ab$cd-x',
 `$cd' is treated as an environment variable.
 
-If WHEN-DEFINED is nil, references to undefined environment variables
+If WHEN-UNDEFINED is nil, references to undefined environment variables
 are replaced by the empty string; if it is a function, the function is called
 with the variable name as argument and should return the text with which
 to replace it or nil to leave it unchanged.