feat(core)!: replace RenderResult with buffered output model

Remove `Deref<Target=str>` and `render_text:String` in favor of
`render_buffer:Vec<(String, RenderResultMode)>` and an
`immediate_output`
flag. Add `RenderResultMode` enum, `r_eprint!`/`r_eprintln!` macros, and
new buffer manipulation methods (`append_to_buffer`, `eprint`, etc.).
Update `Display` to trim output and remove trailing newline. Migrate all
callers and tests away from `Deref` usage.

1 files changed, 1 insertions, 1 deletions

diff --git a/mingling/src/setups/repl_basic.rs b/mingling/src/setups/repl_basic.rs
index cf04372..150048b 100644
--- a/mingling/src/setups/repl_basic.rs
+++ b/mingling/src/setups/repl_basic.rs
@@ -75,7 +75,7 @@ where
     fn setup(self, program: &mut Program<C>) {
         program.with_hook(ProgramHook::empty().on_repl_receive_result(|r| {
             if !r.result.is_empty() {
-                println!("{}", r.result.trim())
+                println!("{}", r.result)
             }
         }));
     }