feat: require renderers to return RenderResult instead of mutating one

BREAKING CHANGE: The `render` method on `Renderer`, `HelpRequest`, and
`ProgramCollect` now returns `RenderResult` instead of taking
`&mut RenderResult`. The `r_print!` and `r_println!` macros have been
removed in favor of using `std::io::Write` directly on `RenderResult`.

1 files changed, 2 insertions, 2 deletions

diff --git a/mingling_core/src/program/hook.rs b/mingling_core/src/program/hook.rs
index 630baae..56d8e0e 100644
--- a/mingling_core/src/program/hook.rs
+++ b/mingling_core/src/program/hook.rs
@@ -718,11 +718,11 @@ mod tests {
             unreachable!()
         }
 
-        fn render(_any: crate::AnyOutput<MockHookEnum>, _r: &mut crate::RenderResult) {
+        fn render(_any: crate::AnyOutput<MockHookEnum>) -> crate::RenderResult {
             unreachable!()
         }
 
-        fn render_help(_any: crate::AnyOutput<MockHookEnum>, _r: &mut crate::RenderResult) {
+        fn render_help(_any: crate::AnyOutput<MockHookEnum>) -> crate::RenderResult {
             unreachable!()
         }