Fold duplicate coverage tests into their neighbours

changelog.d/1576-transit-bikeshare-coverage-prompt.md

@@ -1,6 +1,4 @@
 - Say why Transit and Bike Share are empty outside coverage. Over a city with
-  no feed or system (London, Tokyo) their Layers rows read
-  `No feed here yet · 17 regions available` and
-  `No bike share here yet · 61 systems available`, or how low to fly, instead
-  of `never`; leaving coverage clears the last-update time (German, @gekh,
-  #1576).
+  no feed or system (London, Tokyo) their Layers rows say so and count the
+  covered regions or systems, or say how low to fly, instead of `never`;
+  leaving coverage clears the last-update time (German, @gekh, #1576).