(subplot): Add support for example blocks

In support of #256, this adds `example` as a permitted class and
ensures that we typeset it as though it were a file.

This includes linting it as though it were a file too.

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/typeset.rs b/src/typeset.rs
index 18e5a44..9522e69 100644
--- a/src/typeset.rs
+++ b/src/typeset.rs
@@ -41,6 +41,11 @@ pub fn file_block(attr: &Attr, text: &str) -> Block {
         // Otherwise if it doesn't say numberLines we add that in.
         cbattrs.1.push("numberLines".to_string());
     }
+    // If this was an `example`, convert that class to `file`
+    if cbattrs.1.iter().any(|s| s == "example") {
+        cbattrs.1.retain(|s| s != "example");
+        cbattrs.1.push("file".into());
+    }
     let codeblock = Block::CodeBlock(cbattrs, text.to_string());
     let noattr = ("".to_string(), vec![], vec![]);
     Block::Div(noattr, vec![intro, codeblock])