CSS Error on Sub-Theme in Blocks for Tertiary Content

The tertiary content type's CSS has an error for the block's content:

.
region-tertiary-content .block {	}
.region-tertiary-content .block-title {}
.region-tertiary-content .block-inner {}
.region-tertiary_content .block .content {	}

There is an underscore instead of a dash. This causes any code for the .content of the block to not render properly.