Clarify amount of dots between package and subpackage (GH-17092)

diff --git a/Doc/reference/import.rst b/Doc/reference/import.rst
index 0228bfb..5cce8ce 100644
--- a/Doc/reference/import.rst
+++ b/Doc/reference/import.rst
@@ -83,7 +83,7 @@
 considered a package.
 
 All modules have a name.  Subpackage names are separated from their parent
-package name by dots, akin to Python's standard attribute access syntax.  Thus
+package name by a dot, akin to Python's standard attribute access syntax.  Thus
 you might have a module called :mod:`sys` and a package called :mod:`email`,
 which in turn has a subpackage called :mod:`email.mime` and a module within
 that subpackage called :mod:`email.mime.text`.