dartfmt

Also enabled dartfmt checking for example

pkgs/markdown/example/app.dart

diff --git a/pkgs/markdown/example/app.dart b/pkgs/markdown/example/app.dart
index 86814ff..9e0fd37 100644
--- a/pkgs/markdown/example/app.dart
+++ b/pkgs/markdown/example/app.dart
@@ -50,6 +50,7 @@
     pos++;
     new Timer(typing, addCharacter);
   }
+
   new Timer(typing, addCharacter);
 }
 

pkgs/markdown/tool/travis.sh

diff --git a/pkgs/markdown/tool/travis.sh b/pkgs/markdown/tool/travis.sh
index 33c9a51..1d55ade 100755
--- a/pkgs/markdown/tool/travis.sh
+++ b/pkgs/markdown/tool/travis.sh
@@ -5,14 +5,14 @@
 
 # Analyze sources. Add --fatal-hints, --fatal-warnings, --fatal-lints
 # as you see fit.
-dartanalyzer --strong lib/ test/
+dartanalyzer lib/ test/
 
 # Run tests.
 pub run test
 
 # Assert that code is formatted.
 pub global activate dart_style
-dirty_code=$(pub global run dart_style:format --dry-run lib/ test/)
+dirty_code=$(pub global run dart_style:format --dry-run lib/ test/ example/ benchmark/)
 if [[ -n "$dirty_code" ]]; then
   echo Unformatted files:
   echo "$dirty_code" | sed 's/^/    /'