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, 1 insertions, 1 deletions

diff --git a/mling/src/lib.rs b/mling/src/lib.rs
index 1bf38a7..1de1228 100644
--- a/mling/src/lib.rs
+++ b/mling/src/lib.rs
@@ -1,7 +1,7 @@
 #![allow(unused_imports)]
 
 use mingling::{
-    macros::{chain, gen_program, pack, r_println, renderer},
+    macros::{chain, gen_program, pack, renderer},
     res::ResExitCode,
 };