Assorted cosmetic fixes

Author: PaulAllanSturm

lib/samples/create_planar_and_geodetic_buffers/README.md

@@ -13,7 +13,7 @@ Creating buffers is a core concept in GIS proximity analysis that allows you to
 1. Tap on the map.
 2. A planar and a geodetic buffer will be created at the tap location using the distance (miles) specified.
 3. Continue tapping to create additional buffers. Notice that buffers closer to the equator appear similar in size. As you move north or south from the equator, however, the geodetic polygons become much larger. Geodetic polygons are in fact a better representation of the true shape and size of the buffer.
-4. Tap Clear to remove all buffers and start again.
+4. Tap `Clear` to remove all buffers and start again.
 
 ## How it works
 
@@ -30,7 +30,7 @@ Creating buffers is a core concept in GIS proximity analysis that allows you to
 
 ## Additional information
 
-Buffers can be generated as either planar (flat - coordinate space of the map's spatial reference) or geodetic (technique that considers the curved shape of the Earth's surface, which is generally a more accurate representation). In general, distortion in the map increases as you move away from the standard parallels of the spatial reference's projection. This map is in Web Mercator so areas near the equator are the most accurate. As you move the buffer location north or south from that line, you'll see a greater difference in the polygon size and shape. Planar operations are generally faster, but performance improvement may only be noticeable for large operations (buffering a great number or complex geometry).
+Buffers can be generated as either `planar` (flat - coordinate space of the map's spatial reference) or `geodetic` (technique that considers the curved shape of the Earth's surface, which is generally a more accurate representation). In general, distortion in the map increases as you move away from the standard parallels of the spatial reference's projection. This map is in Web Mercator so areas near the equator are the most accurate. As you move the buffer location north or south from that line, you'll see a greater difference in the polygon size and shape. Planar operations are generally faster, but performance improvement may only be noticeable for large operations (buffering a great number or complex geometry).
 
 For more information about using buffer analysis, see the topic How [Buffer (Analysis) works](https://pro.arcgis.com/en/pro-app/latest/tool-reference/analysis/how-buffer-analysis-works.htm) in the ArcGIS Pro documentation.
 

lib/samples/identify_layer_features/README.md

@@ -6,7 +6,7 @@ Identify features in all layers in a map.
 
 ## Use case
 
-`identifyLayers` allows users to tap on a map, returning features at that location across multiple layers. Because some layer types have sublayers, the sample recursively counts results for sublayers within each layer.
+This sample allows users to tap on a map, returning features at that location across multiple layers. Because some layer types have sublayers, the sample recursively counts results for sublayers within each layer.
 
 ## How to use the sample
 

lib/samples/identify_layer_features/identify_layer_features.png

@@ -50,11 +50,21 @@ class _IdentifyLayerFeaturesSampleState
           // Add a banner to show the results of the identify operation.
           SafeArea(
             child: IgnorePointer(
-              child: Container(
-                color: Colors.white.withAlpha(230),
-                padding: const EdgeInsets.all(10),
-                child: Row(
-                  children: [Text(_message)],
+              child: Visibility(
+                visible: _message.isNotEmpty,
+                child: Container(
+                  padding: const EdgeInsets.all(10),
+                  color: Colors.black.withOpacity(0.7),
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      Text(
+                        _message,
+                        textAlign: TextAlign.center,
+                        style: const TextStyle(color: Colors.white),
+                      ),
+                    ],
+                  ),
                 ),
               ),
             ),