Avoid an ALoc.to_loc call in Reason.string_of_aloc
Avoid an ALoc.to_loc call in Reason.string_of_aloc

Summary: This conversion was causing crashes when I was testing out abstract locations. Instead I'll implement `to_string_no_source` in a way that properly supports abstract locations.

Reviewed By: panagosg7

Differential Revision: D14844283

fbshipit-source-id: 3513975a4494bd40211661cfebf2e18fe56eb940

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow