[enh] group space after while
[enh] group space after elif
[enh] expose a tokenize shortcut
[enh] group space after FOR
[enh] parse first version of 'for'
[enh] handle for_else
[mod] write output to /tmp to use vimdiff
[mod] refactor, remove duplication
[mod] mark progress
[enh] handle first version of try stmt
[mod] refactor, move finally stmt in another rule
[enh] parse exceptions \o/