Few tweaks

README.md

@@ -68,7 +68,7 @@ REST web API for the [libgphoto2](http://www.gphoto.org/) library. You can use i
 
     | name       | value                                     | description                                                                                                                             |
     | ---------- | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
-    | `download` | `true`                                    | Make the browser download the image instead of displaying it                                                                            |
+    | `download` | `true`                                    | Makes the browser download the image instead of displaying it                                                                           |
     | `format`   | `jpeg` / `webp` / `avif` / `png` / `auto` | Returns the image in a given format, `auto` chooses between `avif`, `webp` and `jpeg` (in that order), depending on the browser support |
     | `width`    | *integer*                                 | Returns the image scaled down to the given width                                                                                        |
     | `height`   | *integer*                                 | Returns the image scaled down to the given height                                                                                       |

src/ext/kemal.cr

@@ -3,10 +3,7 @@ def restore_headers_on_exception(response, &)
   begin
     yield response
   rescue ex
-    diff_keys = response.headers.keys - prev_headers.keys
-    diff_keys.each do |key|
-      response.headers.delete(key)
-    end
+    response.headers.clear
     prev_headers.each do |key, value|
       response.headers[key] = value
     end
@@ -36,7 +33,7 @@ def request_accepts?(request, content_type)
   accepts = request.headers["Accept"]?.try do |value|
     value
       .split(',')
-      .map(&.strip.sub(/;.*$/, ""))
+      .map!(&.strip.sub(/;.*$/, ""))
   end
   !!accepts.try &.includes?(content_type)
 end