Add support for skipping the next translation group

Cargo.toml

@@ -15,6 +15,7 @@ mdbook = { version = "0.4.25", default-features = false }
 polib = "0.2.0"
 pulldown-cmark = { version = "0.9.2", default-features = false }
 pulldown-cmark-to-cmark = "10.0.4"
+regex = "1.9.4"
 semver = "1.0.16"
 serde_json = "1.0.91"
 

USAGE.md

@@ -182,6 +182,34 @@ Please see the [`publish.yml`] workflow in the Comprehensive Rust 🦀 repositor
 
 [`publish.yml`]: https://github.com/google/comprehensive-rust/blob/main/.github/workflows/publish.yml
 
+## Marking Sections to be Skipped for Translation
+
+A block can be marked to be skipped for translation by prepending a special HTML
+comment `<!--- mdbook-xgettext:skip -->` to it.
+
+For example:
+
+````markdown
+The following code block should not be translated.
+
+<!--- mdbook-xgettext:skip -->
+
+```
+fn hello() {
+  println!("Hello world!");
+}
+```
+
+Itemized list:
+
+- A should be translated.
+
+<!--- mdbook-xgettext:skip -->
+
+- B should be skipped.
+- C should be translated.
+````
+
 ## Normalizing Existing PO Files
 
 When mdbook-i18n-helpers change, the generated PO files change as well. This can