SCHWED-3472: Always clean up after examples.

modules/bindings/doc/hhblits.rst

@@ -84,6 +84,9 @@ Very similar going by file:
   for hit in hits:
       print hit.aln
 
+  # cleanup
+  hh.Cleanup()
+
 The alignments produced by HHblits are sometimes slightly better than by BLAST,
 so one may want to extract them:
 
@@ -105,6 +108,9 @@ so one may want to extract them:
 
   print output['msa']
 
+  # cleanup
+  hh.Cleanup()
+
 
 Binding API
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