fix(man): use plain space to join value placeholders; use cfg_attr for unix test (#379)

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Author: Copilot

exports/pdu.1

@@ -86,7 +86,7 @@ Width of the visualization
 Cannot be used with \fB\-\-column\-width\fR.
 .RE
 .TP
-\fB\-\-column\-width\fR \fI<TREE_WIDTH>\fR\fI \fR\fI<BAR_WIDTH>\fR
+\fB\-\-column\-width\fR \fI<TREE_WIDTH>\fR \fI<BAR_WIDTH>\fR
 Maximum widths of the tree column and width of the bar column
 .RS
 .PP

src/man_page.rs

@@ -230,7 +230,7 @@ fn render_value_hint(arg: &Arg) -> String {
     } else {
         parts.push(format!("\\fI<{}>\\fR", roff_escape(arg.get_id().as_str())));
     }
-    let value_part = parts.join("\\fI \\fR");
+    let value_part = parts.join(" ");
     let defaults: Vec<_> = arg
         .get_default_values()
         .iter()

tests/sync_man_page.rs

@@ -4,12 +4,12 @@
 
 // Since the CLI in Windows looks a little different, and I am way too lazy to make two versions
 // of man page files, the following test would only run in UNIX-like environment.
-#![cfg(unix)]
 #![cfg(feature = "cli")]
 
 use parallel_disk_usage::man_page::render_man_page;
 
 #[test]
+#[cfg_attr(not(unix), ignore = "man page test only runs on Unix-like platforms")]
 fn man_page() {
     let received = render_man_page();
     let expected = include_str!("../exports/pdu.1");