Issue #1076132 by fizk, friesk, foxtrotcharlie, coolestdude1, David_Roth...

...stein, skwashd, alexpott, tstoeckler | adaddinsane: Hook_block_view_MODULE_DELTA_alter fails with blocks that have a hyphen in the block delta.

Taking over for https://github.com/backdrop/backdrop/pull/415.

PR for backdrop/backdrop-issues#222