Fix formatting in README

Author: Raycosine

glue/crumble/README.md

@@ -226,7 +226,7 @@ of the **Y gate** (y) (i.e. the gate `SQRT_YY_DAG 1 2`).
 
 **Interaction**
 
-- `Arrow Keys (Up/Down/Left/Right)`: Pan the Planar Layout view.
+- `Arrow Keys (Up/Down/Left/Right)`: Pan the Planar Layout view
 - `ctrl+0`: Reset View (reset both the planar view and the timeline scroll)
 - `ctrl+-`: Zoom out
 - `ctrl++` or `ctrl+=`: Zoom in