Do note remove `Content-Type` when `render :body`

`render :body` should just not set the `Content-Type` header. By
removing the header, it breaks the compatibility with other parts.

After this commit, `render :body` will returns `text/html` content type,
sets by default from `ActionDispatch::Response`, and it will preserve
the overridden content type if you override it.

Fixes #14197, #14238

This partially reverts commit 3047376870d4a7adc7ff15c3cb4852e073c8f1da.

1 files changed, 5 insertions, 2 deletions

diff --git a/guides/source/layouts_and_rendering.md b/guides/source/layouts_and_rendering.md
index 66ed6f2e08..bd33c5a146 100644
--- a/guides/source/layouts_and_rendering.md
+++ b/guides/source/layouts_and_rendering.md
@@ -304,10 +304,13 @@ type, by using the `:body` option to `render`:
 render body: "raw"
 ```
 
-TIP: This option should be used only if you explicitly want the content type to
-be unset. Using `:plain` or `:html` might be more appropriate in most of the
+TIP: This option should be used only if you don't care about the content type of
+the response. Using `:plain` or `:html` might be more appropriate in most of the
 time.
 
+NOTE: Unless overriden, your response returned from this render option will be
+`text/html`, as that is the default content type of Action Dispatch response.
+
 #### Options for `render`
 
 Calls to the `render` method generally accept four options: