Improve MacOsDeviceInfo documentation (#192)

* Improve MacOsDeviceInfo documentation

* Fix formatting

* Increase timeout

Author: ueman

.github/workflows/all_plugins.yaml

@@ -34,7 +34,7 @@ jobs:
 
   format:
     runs-on: ubuntu-latest
-    timeout-minutes: 15
+    timeout-minutes: 20
     steps:
       - name: 'Git Checkout'
         uses: actions/checkout@v2

packages/device_info_plus_platform_interface/lib/model/macos_device_info.dart

@@ -23,13 +23,17 @@ class MacOsDeviceInfo {
   /// Operating system type
   final String hostName;
 
-  /// Machine cpu achecture
+  /// Machine cpu architecture
   final String arch;
 
   /// Device model
   final String model;
 
-  /// Machine Kernel version. Example Darwin Kernel Version 15.3.0: Thu Dec 10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64” or “Darwin Kernel Version 15.0.0: Wed Dec 9 22:19:38 PST 2015; root:xnu-3248.31.3~2/RELEASE_ARM64_S8000
+  /// Machine Kernel version.
+  /// Examples:
+  /// `Darwin Kernel Version 15.3.0: Thu Dec 10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64`
+  /// or
+  /// `Darwin Kernel Version 15.0.0: Wed Dec 9 22:19:38 PST 2015; root:xnu-3248.31.3~2/RELEASE_ARM64_S8000`
   final String kernelVersion;
 
   /// Operating system release number
@@ -38,7 +42,7 @@ class MacOsDeviceInfo {
   /// Number of active CPUs
   final int activeCPUs;
 
-  /// Machine's size
+  /// Machine's memory size
   final int memorySize;
 
   /// Device CPU Frequency