Clarify that the "include" statement can only be used at the module level. Closes #2127.
Clarify that the "include" statement can only be used at the module level.
Closes #2127.

cython/cython,cython/cython,scoder/cython,scoder/cython,da-woods/cython,scoder/cython,scoder/cython,da-woods/cython,cython/cython,da-woods/cython,cython/cython,da-woods/cython