Added additional entrypoint script.

Added a third entrypoint to use python's minor version as well.

This can help when testing out differences of python versions. One could easily open "ipython3.10" and test it's differences with "ipython3.8".

setupbase.py

@@ -211,14 +211,16 b' def find_entry_points():'
     use, our own build_scripts_entrypt class below parses these and builds
     command line scripts.
 
-    Each of our entry points gets both a plain name, e.g. ipython, and one
-    suffixed with the Python major version number, e.g. ipython3.
+    Each of our entry points gets a plain name, e.g. ipython, a name
+    suffixed with the Python major version number, e.g. ipython3, and
+    a name suffixed with the Python major.minor version number, eg. ipython3.8.
     """
     ep = [
             'ipython%s = IPython:start_ipython',
         ]
-    suffix = str(sys.version_info[0])
-    return [e % '' for e in ep] + [e % suffix for e in ep]
+    major_suffix = str(sys.version_info[0])
+    minor_suffix = ".".join([str(sys.version_info[0]), str(sys.version_info[1])])
+    return [e % '' for e in ep] + [e % major_suffix for e in ep] + [e % minor_suffix for e in ep]
 
 class install_lib_symlink(Command):
     user_options = [