fix: apply PR comments

clap_mangen/src/render.rs

@@ -9,10 +9,10 @@ pub(crate) fn subcommand_heading(cmd: &clap::Command) -> &str {
 }
 
 pub(crate) fn about(roff: &mut Roff, cmd: &clap::Command) {
-    let name = cmd.get_display_name().unwrap_or_else(|| cmd.get_name()).to_string();
+    let name = cmd.get_display_name().unwrap_or_else(|| cmd.get_name());
     let s = match cmd.get_about().or_else(|| cmd.get_long_about()) {
         Some(about) => format!("{} - {}", name, about),
-        None => name,
+        None => name.to_owned(),
     };
     roff.text([roman(s)]);
 }
@@ -30,7 +30,7 @@ pub(crate) fn description(roff: &mut Roff, cmd: &clap::Command) {
 }
 
 pub(crate) fn synopsis(roff: &mut Roff, cmd: &clap::Command) {
-    let name = cmd.clone().render_usage().to_string();
+    let name = cmd.get_bin_name().unwrap_or_else(|| cmd.get_name());
     let mut line = vec![bold(name), roman(" ")];
 
     for opt in cmd.get_arguments().filter(|i| !i.is_hide_set()) {

clap_mangen/tests/snapshots/sub_subcommand_help.roff

@@ -1,10 +1,10 @@
 .ie /n(.g .ds Aq /(aq
 .el .ds Aq '
-.TH help 1  "help " 
+.TH my-app-help 1  "help " 
 .SH NAME
-help /- Print this message or the help of the given subcommand(s)
+my/-app/-help /- Print this message or the help of the given subcommand(s)
 .SH SYNOPSIS
-/fBhelp/fR [/fIsubcommands/fR]
+/fBmy/-app help/fR [/fIsubcommands/fR]
 .SH DESCRIPTION
 Print this message or the help of the given subcommand(s)
 .SH SUBCOMMANDS