[PATCH] rust: macros: add descriptive doc-comment to internal fmt function

[Ivan Tverdokhleb <mbkchelofficialdev@gmail.com>]

Add descriptive documentation comments to the internal formatting function,

explaining its role in parsing format strings and wrapping arguments into

the Adapter helper.

Signed-off-by: Ivan Tverdokhleb <mbkchelofficialdev@gmail.com>
---
 rust/macros/fmt.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rust/macros/fmt.rs b/rust/macros/fmt.rs
index ce6c72493..676156dc9 100644
--- a/rust/macros/fmt.rs
+++ b/rust/macros/fmt.rs
@@ -6,6 +6,9 @@
 use quote::quote_spanned;
 
 /// Please see [`crate::fmt`] for documentation.
+///
+/// This function parses the format string, extracts named arguments from curly braces,
+/// and wraps arguments into the `Adapter` helper.
 pub(crate) fn fmt(input: TokenStream) -> TokenStream {
     let mut input = input.into_iter();
 
-- 
2.56.0