produce_data.py without the produced data!

.hgignore

+syntax: glob
+
+datafile

README.md

@@ -2,3 +2,15 @@
 
 I'd like to see if a bad obsoleted commit in a topic is fully deleted from the
 repository when the topic is merged...
+
+```
+hg topic try_merge_bad_obs_commit
+python produce_data.py
+hg add
+hg commit -m "Bad commit with data included"
+
+# now the repository is big (~2 Mo)
+
+hg forget datafile
+hg add .hgignore
+```

produce_data.py

+with open("datafile", "w") as file:
+    file.write("heptapod is great!\n" * int(1e5))