mdBook: update to 0.4.1.

Add patch to fix page index in void-docs.

srcpkgs/mdBook/patches/summary.patch

@@ -0,0 +1,53 @@
+From dcf9462d1e69975d505dfb1b6d4139acb89f10a1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=89rico=20Rolim?= <erico.erc@gmail.com>
+Date: Tue, 28 Jul 2020 22:54:49 -0300
+Subject: [PATCH] summary: turn SoftBreak events into spaces.
+
+Summary items that had their name split into two lines ended up with the
+last word of one line and the first word of the next line glued
+together, since a space wasn't added.
+
+Added test case for it.
+
+Fixes #1218
+---
+ src/book/summary.rs | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+diff --git a/src/book/summary.rs b/src/book/summary.rs
+index 996913a0a5..4782eb84ac 100644
+--- src/book/summary.rs
++++ src/book/summary.rs
+@@ -569,6 +569,7 @@ fn stringify_events(events: Vec<Event<'_>>) -> String {
+         .into_iter()
+         .filter_map(|t| match t {
+             Event::Text(text) | Event::Code(text) => Some(text.into_string()),
++            Event::SoftBreak => Some(String::from(" ")),
+             _ => None,
+         })
+         .collect()
+@@ -926,4 +927,24 @@ mod tests {
+ 
+         assert_eq!(got, should_be);
+     }
++
++    /// Regression test for https://github.com/rust-lang/mdBook/issues/1218
++    /// Ensure chapter names spread across multiple lines have spaces between all the words.
++    #[test]
++    fn add_space_for_multi_line_chapter_names() {
++        let src = "- [Chapter\ntitle](./chapter.md)";
++        let should_be = vec![SummaryItem::Link(Link {
++            name: String::from("Chapter title"),
++            location: Some(PathBuf::from("./chapter.md")),
++            number: Some(SectionNumber(vec![1])),
++            nested_items: Vec::new(),
++        })];
++
++        let mut parser = SummaryParser::new(src);
++        let got = parser
++            .parse_numbered(&mut 0, &mut SectionNumber::default())
++            .unwrap();
++
++        assert_eq!(got, should_be);
++    }
+ }

srcpkgs/mdBook/template

@@ -1,6 +1,6 @@
 # Template file for 'mdBook'
 pkgname=mdBook
-version=0.4.0
+version=0.4.1
 revision=1
 build_style=cargo
 short_desc="Create book from markdown files. Like Gitbook but implemented in Rust"
@@ -9,7 +9,7 @@ license="MPL-2.0"
 homepage="https://github.com/rust-lang/mdBook"
 changelog="https://raw.githubusercontent.com/rust-lang/mdBook/master/CHANGELOG.md"
 distfiles="https://github.com/rust-lang/mdBook/archive/v${version}.tar.gz"
-checksum=402439a3ce61415bb84f0bf7681e15c96a9ce627c9e2c08647ec8c557c1a9b1a
+checksum=48ee2d7102b440dbdb5ecb0849e82368a57777b03f3d6750ac7c47157b1da7ac
 
 post_install() {
 	vlicense LICENSE