Inconsistent handling of spacing in node and edge loading

[atausz-stripe]

When node ids have spaces in them, they aren't loaded properly by the edge loading binary (https://github.com/teapot-co/tempest/blob/master/src/main/cpp/map_edges.cpp).

Suppose that you have nodes with ids "a", " a". The edge loader will remove whitespace from the second, and overwrite the internal node id of the first with the second.