This commit introduces a shorthand for defining and calling macros when
using them as a reusable substitute for variables assigned complex values
(e.g. string literals with or without newline escapes). The use-case is
formatting - from my experience it's easier to visually parse a `macro`
`endmacro` block than a multiline variable assignment.
Signed-off-by: mataha <mataha@users.noreply.github.com>
Just migrated a repo from tera to askama and this was one of the only
things that was different. This is also coherent with `{% block %}` for
which I added the same feature years ago.
This PR adds the tests by @msrd0 <git@msrd0.de> that failed before.
The error was fixed somewhen between f23162a and now, so these tests
serve to prevent regressions in the future.
I simplified the tests very slightly to omit whitespaces in the output.
