docs: migrate renderer examples to buffer macro and update docs

Update all documentation and code examples to use the new
`#[renderer(buffer)]`
pattern with `r_println!` instead of manually constructing
`RenderResult`
with `writeln!`.

1 files changed, 7 insertions, 10 deletions

diff --git a/docs/pages/5-multiple-commands.md b/docs/pages/5-multiple-commands.md
index d9a335a..0b71e49 100644
--- a/docs/pages/5-multiple-commands.md
+++ b/docs/pages/5-multiple-commands.md
@@ -10,6 +10,7 @@ Real-world CLIs rarely have just one command. Let's extend our previous greet pr
 Work in the same project:
 
 ```rust
+@@@use mingling::macros::buffer;
 // Declare two commands
 dispatcher!("greet", CMDGreet => EntryGreet);
 dispatcher!("add",   CMDAdd   => EntryAdd);
@@ -29,18 +30,14 @@ fn handle_add(args: EntryAdd) -> Next {
     ResultSum::new(sum).into()
 }
  
-#[renderer]
-fn render_greet(result: ResultGreeting) -> RenderResult {
-    let mut r = RenderResult::new();
-    writeln!(r, "Hello, {}!", *result).ok();
-    r
+#[renderer(buffer)]
+fn render_greet(result: ResultGreeting) {
+    r_println!("Hello, {}!", *result);
 }
  
-#[renderer]
-fn render_sum(result: ResultSum) -> RenderResult {
-    let mut r = RenderResult::new();
-    writeln!(r, "Sum: {}", *result).ok();
-    r
+#[renderer(buffer)]
+fn render_sum(result: ResultSum) {
+    r_println!("Sum: {}", *result);
 }
  
 fn main() {