Remove the sphinxcontrib.programout [docs]dependency (#3830)

- By making a static text file at release time, and including that
   instead.

acme/docs/conf.py

@@ -39,7 +39,6 @@ extensions = [
     'sphinx.ext.todo',
     'sphinx.ext.coverage',
     'sphinx.ext.viewcode',
-    'sphinxcontrib.programoutput',
 ]
 
 autodoc_member_order = 'bysource'

acme/docs/jws-help.txt

@@ -0,0 +1,8 @@
+usage: jws [-h] [--compact] {sign,verify} ...
+
+positional arguments:
+  {sign,verify}
+
+optional arguments:
+  -h, --help     show this help message and exit
+  --compact

acme/docs/man/jws.rst

@@ -1 +1 @@
-.. program-output:: jws --help all
+.. literalinclude:: ../jws-help.txt