Add extra version of py-prompt-toolkit (#15062)

var/spack/repos/builtin/packages/py-prompt-toolkit/package.py

@@ -12,8 +12,9 @@ class PyPromptToolkit(PythonPackage):
     homepage = "https://pypi.python.org/pypi/prompt_toolkit"
     url      = "https://pypi.io/packages/source/p/prompt_toolkit/prompt_toolkit-1.0.9.tar.gz"
 
-    version('2.0.9', sha256='2519ad1d8038fd5fc8e770362237ad0364d16a7650fb5724af6997ed5515e3c1')
-    version('1.0.9', sha256='cd6523b36adc174cc10d54b1193eb626b4268609ff6ea92c15bcf1996609599c')
+    version('2.0.9',  sha256='2519ad1d8038fd5fc8e770362237ad0364d16a7650fb5724af6997ed5515e3c1')
+    version('1.0.16', sha256='c1cedd626e08b8ee830ee65897de754113ff3f3035880030c08b01674d85c5b4')
+    version('1.0.9',  sha256='cd6523b36adc174cc10d54b1193eb626b4268609ff6ea92c15bcf1996609599c')
 
     depends_on('py-setuptools', type='build')
     depends_on('py-six@1.9.0:', type=('build', 'run'))