Adjusted installing.rst.
Installation guide
==================
+This version of the library is compatible with Python versions 3.7, 3.8,
+and 3.9.
+
It is recommended always to install into a virtual environment.
You can use pip to install the library from the
@@ -31,11 +34,9 @@ with major version number increments.
This package depends only on modules from the Python Standard Library,
except for the extra options described below.
-This version of the library is compatible with Python versions 3.7, 3.8,
-and 3.9. The library's suite of tests is run against these versions and
+The library's suite of tests is run against these versions and
has 100% line and branch coverage.
-
Install options
===============
