Merge file and image asset directories

docs/src/html.rs

@@ -168,7 +168,7 @@ impl<'a> Handler<'a> {
     }
 
     fn handle_image(&self, link: &str) -> String {
-        if let Some(file) = IMAGES.get_file(link) {
+        if let Some(file) = FILES.get_file(link) {
             self.resolver.image(&link, file.contents()).into()
         } else if let Some(url) = self.resolver.link(link) {
             url

docs/src/lib.rs

@@ -23,7 +23,6 @@ use unscanny::Scanner;
 
 static SRC: Dir<'_> = include_dir!("$CARGO_MANIFEST_DIR/src");
 static FILES: Dir<'_> = include_dir!("$CARGO_MANIFEST_DIR/../assets/files");
-static IMAGES: Dir<'_> = include_dir!("$CARGO_MANIFEST_DIR/../assets/images");
 static DETAILS: Lazy<yaml::Mapping> = Lazy::new(|| yaml("reference/details.yml"));
 static GROUPS: Lazy<Vec<GroupData>> = Lazy::new(|| yaml("reference/groups.yml"));