Remove ruby dependency from mantests

docs/build_mantests.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+import yaml
+
+with open("content/manual/manual.yml") as f:
+  manual = yaml.load(f)
+  for section in manual.get('sections', []):
+    for entry in section.get('entries', []):
+      for example in entry.get('examples', []):
+        print(example.get('program', '').replace('\n', ' '))
+        print(example.get('input', ''))
+        for s in example.get('output', []):
+          print(s)
+        print('')

tests/mantest

@@ -3,5 +3,5 @@
 . "${0%/*}/setup" "$@"
 
 # We set PAGER because there's a mantest for `env` that uses it.
-(cd $JQBASEDIR/docs && rake mantests) |
+(cd $JQBASEDIR/docs && pipenv run python3 build_mantests.py) |
     env PAGER=less $VALGRIND $Q $JQ -L "$mods" --run-tests