code_review: PR #1492

- Remove all synchronous method in commands
- `Command.ReadToEndAsync` now is protected method
- Rename `ResultAsync` to `GetResultAsync`
- Call `ConfigureAwait(false)` when there's no context

Signed-off-by: leo <longshuang@msn.cn>

src/Commands/QueryRepositoryRootPath.cs

@@ -1,4 +1,6 @@
-namespace SourceGit.Commands
+using System.Threading.Tasks;
+
+namespace SourceGit.Commands
 {
     public class QueryRepositoryRootPath : Command
     {
@@ -7,5 +9,10 @@
             WorkingDirectory = path;
             Args = "rev-parse --show-toplevel";
         }
+
+        public async Task<Result> GetResultAsync()
+        {
+            return await ReadToEndAsync().ConfigureAwait(false);
+        }
     }
 }