Bump MSRV of `blake3` to 1.72.0

This is because the MSRV of `zeroize` v1.8.0 is 1.72.0.

b3sum/build.rs

@@ -24,7 +24,42 @@ fn generate_man_page(out_dir: &std::path::Path) -> std::io::Result<()> {
 
     let man = clap_mangen::Man::new(command).date("2024-04-24");
     let mut buf = Vec::new();
-    man.render(&mut buf)?;
+    man.render_title(&mut buf)?;
+
+    // The NAME section.
+    let mut roff = clap_mangen::roff::Roff::new();
+    roff.control("SH", ["NAME"]);
+    roff.text([clap_mangen::roff::roman(
+        "b3sum - compute and check BLAKE3 message digest",
+    )]);
+    roff.to_writer(&mut buf)?;
+
+    // The SYNOPSIS section.
+    let mut roff = clap_mangen::roff::Roff::new();
+    roff.control("SH", ["SYNOPSIS"]);
+    roff.text([
+        clap_mangen::roff::bold("b3sum"),
+        clap_mangen::roff::roman(" ["),
+        clap_mangen::roff::italic("OPTIONS"),
+        clap_mangen::roff::roman("] ["),
+        clap_mangen::roff::italic("FILE"),
+        clap_mangen::roff::roman("]..."),
+    ]);
+    roff.to_writer(&mut buf)?;
+
+    man.render_description_section(&mut buf)?;
+    man.render_options_section(&mut buf)?;
+
+    // The SEE ALSO section.
+    let mut roff = clap_mangen::roff::Roff::new();
+    roff.control("SH", ["SEE ALSO"]);
+    roff.text([
+        clap_mangen::roff::bold("b2sum"),
+        clap_mangen::roff::roman("(1), "),
+        clap_mangen::roff::bold("md5sum"),
+        clap_mangen::roff::roman("(1)"),
+    ]);
+    roff.to_writer(&mut buf)?;
 
     std::fs::write(out_dir.join("b3sum.1"), buf)?;
     Ok(())

b3sum/src/cli.rs

@@ -8,7 +8,9 @@ const NO_NAMES_ARG: &str = "no_names";
 const RAW_ARG: &str = "raw";
 const CHECK_ARG: &str = "check";
 
-/// compute and check BLAKE3 message digest.
+/// Print or check BLAKE3 checksums.
+///
+/// With no FILE, or when FILE is -, read standard input.
 #[derive(Parser)]
 #[command(version, max_term_width(100))]
 pub struct Inner {