Implement new-style with tag ({% with a=b x=y %})
Remove trailing whitespace
Enable yesno filter test
Add tests for missing variables
Fix typo in tests
More test errors
Fix filter lookups and application to not exit early on missing variables
Change expectations for |random on missing variable; errors don't escape standalone filters
Fix with tag's handling of values that resolve to promises
Merge feature/with2 into custom build
Merge bug/missingvars into custom build
Build 1.4.3-custom