consistent wording between the two docstrings

Author: gpshead

Lib/glob.py

@@ -27,8 +27,9 @@ def glob(pathname, *, root_dir=None, dir_fd=None, recursive=False,
 
     If `root_dir` is not None, it should be a path-like object specifying the
     root directory for searching. It has the same effect as changing the
-    current directory before calling it. If pathname is relative, the
-    result will contain paths relative to `root_dir`.
+    current directory before calling it (without actually
+    changing it). If pathname is relative, the result will contain
+    paths relative to `root_dir`.
 
     If `dir_fd` is not None, it should be a file descriptor referring to a
     directory, and paths will then be relative to that directory.