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-rw-r--r--src/fence_wrapper.rs11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/fence_wrapper.rs b/src/fence_wrapper.rs
index fc8f1c2..565f848 100644
--- a/src/fence_wrapper.rs
+++ b/src/fence_wrapper.rs
@@ -1,7 +1,18 @@
+//! Utilities for wrapping arbitrary input in a Markdown fenced code block.
+
use std::io::{Read, Write};
use crate::util::fence::generate_outer_backticks;
+/// Reads all input, wraps it in a Markdown fenced code block, and writes it to output.
+///
+/// The opening fence includes the supplied language tag. If `lang` is empty, the fence is emitted
+/// without a language identifier.
+///
+/// The fence length is chosen so that any backtick runs inside the input do not accidentally close
+/// the outer fence.
+///
+/// This function intentionally writes a blank line before the closing fence.
pub fn wrap_in_fence<R: Read, W: Write>(
mut input: R,
mut output: W,