Cleanup, add flavor texts

src/10.cs

@@ -283,7 +283,7 @@ internal class Day10 : Day
             }
         }
 
-        RenderGrid(interior);
+        // RenderGrid(interior);
 
         return $"Number of spaces interior to the pipeline: <+white>{interior.Count}";
     }

src/16.cs

@@ -148,7 +148,7 @@ internal class Day16 : Day
     {
         var beamdata = PropagateLight(new beaminfo(new ivec2(-1, 0), ivec2.RIGHT));
         long energized = NumEnergized(beamdata);
-        return $"<+white>{energized}";
+        return $"# energized tiles: <+white>{energized}";
     }
 
     internal override string Part2()
@@ -186,6 +186,6 @@ internal class Day16 : Day
                 highest = val;
             }
         }
-        return $"<+white>{highest}";
+        return $"Highest # energized tiles: <+white>{highest}";
     }
 }

src/21.cs

@@ -95,7 +95,7 @@ internal class Day21 : Day
         }
 
         long numVisited = reachableNow.Count;
-        return $"<+white>{numVisited}";
+        return $"Garden plots reachable in 24 steps: <+white>{numVisited}";
     }
 
     internal override string Part2()
@@ -128,6 +128,6 @@ internal class Day21 : Day
                           cornerTop + cornerRight + cornerBottom + cornerLeft +
                           (gridWidth + 1) * (smallTopRight + smallTopLeft + smallBottomRight + smallBottomLeft) +
                           gridWidth * (largeTopRight + largeTopLeft + largeBottomRight + largeBottomLeft);
-        return $"<+white>{numVisited}";
+        return $"Garden plots reachable in {steps:N0} steps: <+white>{numVisited}";
     }
 }

src/23.cs

@@ -196,7 +196,7 @@ internal class Day23 : Day
 
         // Render();
 
-        return $"<+white>{dist}";
+        return $"# steps in longest hike: <+white>{dist}";
     }
 
     internal override string Part2()
@@ -246,6 +246,6 @@ internal class Day23 : Day
         seen.Clear();
         int dist = GetLongestDistanceFrom(graph, start, seen);
 
-        return $"<+white>{dist}";
+        return $"# steps in longest hike ignoring slopes: <+white>{dist}";
     }
 }