params: ensure short description is only a single line

So a UI can display it properly

src/modules/commander/commander_params.c

@@ -341,6 +341,7 @@ PARAM_DEFINE_INT32(COM_LOW_BAT_ACT, 0);
 
 /**
  * Time-out to wait when offboard connection is lost before triggering offboard lost action.
+ *
  * See COM_OBL_ACT and COM_OBL_RC_ACT to configure action.
  *
  * @group Commander
@@ -595,6 +596,7 @@ PARAM_DEFINE_FLOAT(COM_ARM_IMU_GYR, 0.25f);
 
 /**
  * Maximum magnetic field inconsistency between units that will allow arming
+ *
  * Set -1 to disable the check.
  *
  * @group Commander

src/modules/commander/failure_detector/failure_detector_params.c

@@ -107,9 +107,9 @@ PARAM_DEFINE_FLOAT(FD_FAIL_R_TTRI, 0.3);
 PARAM_DEFINE_FLOAT(FD_FAIL_P_TTRI, 0.3);
 
 /**
- * Enable PWM input on AUX5 or MAIN5 (depending on board) for engaging failsafe from an external
- * automatic trigger system (ATS).
+ * Enable PWM input on for engaging failsafe from an external automatic trigger system (ATS).
  *
+ * Enabled on either AUX5 or MAIN5 depending on board.
  * External ATS is required by ASTM F3322-18.
  *
  * @boolean
@@ -132,6 +132,7 @@ PARAM_DEFINE_INT32(FD_EXT_ATS_TRIG, 1900);
 
 /**
  * Enable checks on ESCs that report their arming state.
+ *
  * If enabled, failure detector will verify that all the ESCs have successfully armed when the vehicle has transitioned to the armed state.
  * Timeout for receiving an acknowledgement from the ESCs is 0.3s, if no feedback is received the failure detector will auto disarm the vehicle.
  *