tooling: add unu.py

FossilOrigin-Name: b7a37204e6be19c38dc8203a813c0be6b6eb99326304a270e05363b57d44d714

tools/unu.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python
+
+import sys
+
+if __name__ == "__main__":
+  f = sys.argv[1]
+  in_block = False
+  with open(f, 'r') as source:
+    for line in source.readlines():
+      if line.rstrip() == '~~~': in_block = not in_block
+      elif in_block: print(line.rstrip())