Rollup merge of #80393 - ehuss:doc-git-link, r=jyn514

Add links to the source for the rustc and rustdoc books. This adds a little icon in the upper-right corner of the books so that readers can find the source if they want to make changes or file issues. This is already included in several of the other books.
rust-lang · Dec 28, 2020 · bae6475 · bae6475
2 parents 255fde3 + 142764f
commit bae6475
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diff --git a/src/doc/rustc/book.toml b/src/doc/rustc/book.toml
@@ -3,3 +3,6 @@ authors = ["The Rust Project Developers"]
 multilingual = false
 src = "src"
 title = "The rustc book"
+
+[output.html]
+git-repository-url = "https://github.com/rust-lang/rust/tree/master/src/doc/rustc"
diff --git a/src/doc/rustdoc/book.toml b/src/doc/rustdoc/book.toml
@@ -2,3 +2,6 @@
 authors = ["The Rust Project Developers"]
 src = "src"
 title = "The rustdoc book"
+
+[output.html]
+git-repository-url = "https://github.com/rust-lang/rust/tree/master/src/doc/rustdoc"