Changing heading level of 'Alternate code'

Change level 3 (###) to level 2 (##):

    sgit -e 's/^### \(Alternate code\)/## \1/g' '*README.md'

which is the same as:

    sgit -e 's/^### Alternate code/## Alternate code/g' '*README.md'

This is per discussion in GitHub.

2006/night/README.md

@@ -29,7 +29,7 @@ echo "Do or do not. There is no try."
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 To compile: