[relate][get_turns] fixed relate(L/L) error for collinear segments and a self-intersection in the middle, added is_collinear to turn_operation_linear, added setting of is_collinear to get_turns(L/L), fixed logic error in turns generation for endpoint-internal IP
Merge branch 'feature/relate' of github.com:boostorg/geometry into feature/relate
[relate][get_turns] added not yet finished support for relate(L,A), changed operations generated by get_turns(L,A) for collinear segments of Areal geometry, fixed errors in relate(L,A)