Issue #22320: Fix broken link in the General Python FAQ.
Original patch by Josh Lynn.

--HG--
branch : 3.4
Issue #22320: merge from 3.4
Issue #19447: Suppress output of py_compile.compile().

--HG--
branch : 3.4
Issue #19447: Suppress output of py_compile.compile().
Remove unused imports.

--HG--
branch : 3.4
Remove unused imports.
a more universal unicode char example
try to pick a unicode char that latex understands
sigma actually works in latex...