Update to mdbook 0.5

Author: ehuss

.github/workflows/ci.yaml

@@ -1555,7 +1555,7 @@ jobs:
         uses: taiki-e/install-action@v2
         env:
           # renovate: datasource=crate depName=mdbook
-          MDBOOK_VERSION: "0.4.43"
+          MDBOOK_VERSION: "0.5.1"
         with:
           tool: mdbook@${{ env.MDBOOK_VERSION }}
       - name: Build user-guide (stable)

ci/actions-templates/test-docs-template.yaml

@@ -15,7 +15,7 @@ jobs: # skip-all
         uses: taiki-e/install-action@v2
         env:
           # renovate: datasource=crate depName=mdbook
-          MDBOOK_VERSION: "0.4.43"
+          MDBOOK_VERSION: "0.5.1"
         with:
           tool: mdbook@${{ env.MDBOOK_VERSION }}
       - name: Build user-guide (stable)

doc/dev-guide/book.toml

@@ -1,12 +1,9 @@
 [book]
 authors = ["The Rust Project Developers"]
 language = "en"
-multilingual = false
-src = "src"
 title = "The Rustup developer guide"
 
 [output.html]
-curly-quotes = true
 edit-url-template = "https://github.com/rust-lang/rustup/edit/HEAD/doc/dev-guide/{path}"
 git-repository-url = "https://github.com/rust-lang/rustup/tree/HEAD/doc/dev-guide"
 site-url = "https://rust-lang.github.io/rustup/dev-guide"

doc/user-guide/book.toml

@@ -3,7 +3,6 @@ authors = ["The Rust Project Developers"]
 title = "The rustup book"
 
 [output.html]
-curly-quotes = true
 edit-url-template = "https://github.com/rust-lang/rustup/edit/HEAD/doc/user-guide/{path}"
 git-repository-url = "https://github.com/rust-lang/rustup/tree/HEAD/doc/user-guide"
 site-url = "https://rust-lang.github.io/rustup/"