Adjust the "unsquare corners" message per feedback

https://twitter.com/williamscraigm/status/1125589440317968384
(Not that the building should be literally square, just the corners of the building)

data/core.yaml

@@ -1444,11 +1444,11 @@ en:
           message: "{feature} has no outlet"
           reference: "One-way roads must lead to other roads."
     unsquare_way:
-      title: Unsquare Buildings
-      message: "{feature} isn't quite square"
-      tip: "Find buildings with nearly square corners"
+      title: Unsquare Corners
+      message: "{feature} has unsquare corners"
+      tip: "Find features with unsquare corners that can be drawn better"
       buildings:
-        reference: "Buildings that are almost square should be squared."
+        reference: "Buildings with unsquare corners can often be drawn more accurately."
     fix:
       connect_almost_junction:
         annotation: Connected very close features.

dist/locales/en.json

@@ -1790,11 +1790,11 @@
                 }
             },
             "unsquare_way": {
-                "title": "Unsquare Buildings",
-                "message": "{feature} isn't quite square",
-                "tip": "Find buildings with nearly square corners",
+                "title": "Unsquare Corners",
+                "message": "{feature} has unsquare corners",
+                "tip": "Find features with unsquare corners that can be drawn better",
                 "buildings": {
-                    "reference": "Buildings that are almost square should be squared."
+                    "reference": "Buildings with unsquare corners can often be drawn more accurately."
                 }
             },
             "fix": {