d2s_spec_keyvalue_mapping.md

@@ -33,7 +33,7 @@ outgoing key: _accl_sum
 outgoing name: Acceleration (resulting)
 outgoing type: Double
 Unit: g
-formula: sqrt($[N(0)]_accl$^2+$[N(1)]_accl$^2+$[N(2)]_accl$^2)
+formula: ```sqrt($[N(0)]_accl$^2+$[N(1)]_accl$^2+$[N(2)]_accl$^2)```
 
 incoming key: _ble_temp (contains values in hexadecimal format e.g. A2F8)
 outgoing key: _ble_temp_puck