Do not modify destination asset's fingerprint after markup phase
Do not trigger asset bundling when nonrelevant sources change
More flexible count-and-execute script for testing asset bundling
Group test setup and assertions
Add tests for not copying unchanged source assets
Move common fixture related data to FixtureConfig
Raise env command for bundling assets and counting to common test helpers
Simplify BundleFile initialization
Add test for BundleFile's behavior in markup and write phases
Add test for StampFile's behavior in markup and write phases
Update test files manifest in gemspec
Remove unneeded printing of precompiled site location after creation