remove treehouse-format crate and collapse everything into src

src/vfs/html_canonicalize.rs

@@ -0,0 +1,36 @@
+use core::fmt;
+
+use super::{Dir, Query, VPath};
+
+pub struct HtmlCanonicalize<T> {
+    inner: T,
+}
+
+impl<T> HtmlCanonicalize<T> {
+    pub fn new(inner: T) -> Self {
+        Self { inner }
+    }
+}
+
+impl<T> Dir for HtmlCanonicalize<T>
+where
+    T: Dir,
+{
+    fn query(&self, path: &VPath, query: &mut Query) {
+        let mut path = path.to_owned();
+        if path.extension() == Some("html") {
+            path.set_extension("");
+        }
+
+        self.inner.query(&path, query);
+    }
+}
+
+impl<T> fmt::Debug for HtmlCanonicalize<T>
+where
+    T: fmt::Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "HtmlCanonicalize({:?})", self.inner)
+    }
+}