More documentation (#10589)

packages/flutter_tools/lib/src/commands/create.dart

diff --git a/packages/flutter_tools/lib/src/commands/create.dart b/packages/flutter_tools/lib/src/commands/create.dart
index cf8c3ec..cb60d49 100644
--- a/packages/flutter_tools/lib/src/commands/create.dart
+++ b/packages/flutter_tools/lib/src/commands/create.dart
@@ -311,7 +311,7 @@
   'yaml'
 ]);
 
-/// Return `null` if the project name is legal. Return a validation message if
+/// Return null if the project name is legal. Return a validation message if
 /// we should disallow the project name.
 String _validateProjectName(String projectName) {
   if (!package_names.isValidPackageName(projectName))
@@ -324,7 +324,7 @@
   return null;
 }
 
-/// Return `null` if the project directory is legal. Return a validation message
+/// Return null if the project directory is legal. Return a validation message
 /// if we should disallow the directory name.
 String _validateProjectDir(String dirPath, { String flutterRoot }) {
   if (fs.path.isWithin(flutterRoot, dirPath)) {