Rename nmod_poly_factor.doc to nmod_poly_factor.txt in create_doc.c
Rename nmod_poly_factor.doc to nmod_poly_factor.txt in create_doc.c

dsroche/flint2,jpflori/flint2,jpflori/flint2,jpflori/flint2,wbhart/flint2,jpflori/flint2,dsroche/flint2,dsroche/flint2,fredrik-johansson/flint2,wbhart/flint2,fredrik-johansson/flint2,fredrik-johansson/flint2,dsroche/flint2,wbhart/flint2