Indent the directive properly to attach it to Threads autoclass
documentation.
Fixes:
WARNING: don't know which module to import for autodocumenting
'__str__' (try placing a "module" or "currentmodule" directive in the
document, or giving an explicit module name)
Remove the __len__ functions, as they exhaust the iterator, breaking
'list(x)'.
This is a follow-up to 8866a89e.
Signed-off-by: Justus Winter <4winter@informatik.uni-hamburg.de>
Move each classes documentation into its own file and thus into its
own page in the generated documentation.
Signed-off-by: Justus Winter <4winter@informatik.uni-hamburg.de>
