Move optional filter documentation into filters section

2 files changed, 26 insertions, 25 deletions

diff --git a/book/src/filters.md b/book/src/filters.md
index 35cb557..6cb8566 100644
--- a/book/src/filters.md
+++ b/book/src/filters.md
@@ -11,7 +11,8 @@ is passed to the next.
 {{"HELLO" | lower}}
 ```
 
-Askama has a collection of built-in filters, documented below, but can also include custom filters.
+Askama has a collection of built-in filters, documented below, but can also include custom filters. Additionally, the `json` and `yaml` filters are included in the built-in filters,
+but are disabled by default. Enable them with Cargo features (see below for more information).
 
 ## Built-In Filters
 
@@ -251,4 +252,27 @@ fn main() {
     let t = MyFilterTemplate { s: "foo" };
     assert_eq!(t.render().unwrap(), "faa");
 }
-```
\ No newline at end of file
+```
+
+## The `json` filter
+
+Enabling the `serde-json` filter will enable the use of the `json` filter.
+This will output formatted JSON for any value that implements the required
+`Serialize` trait.
+
+```
+{
+  "foo": "{{ foo }}",
+  "bar": {{ bar|json }}
+}
+```
+
+## The `yaml` filter
+
+Enabling the `serde-yaml` filter will enable the use of the `yaml` filter.
+This will output formatted JSON for any value that implements the required
+`Serialize` trait.
+
+```
+{{ foo|yaml }}
+```
diff --git a/book/src/integrations.md b/book/src/integrations.md
index ed0fec0..25bcc18 100644
--- a/book/src/integrations.md
+++ b/book/src/integrations.md
@@ -50,26 +50,3 @@ Enabling the `with-warp` feature appends an implementation of Warp's `Reply`
 trait for each template type. This makes it simple to return a template from
 a Warp filter. See [the example](https://github.com/djc/askama/blob/master/askama_warp/tests/warp.rs)
 from the Askama test suite for more on how to integrate.
-
-## The `json` filter
-
-Enabling the `serde-json` filter will enable the use of the `json` filter.
-This will output formatted JSON for any value that implements the required
-`Serialize` trait.
-
-```
-{
-  "foo": "{{ foo }}",
-  "bar": {{ bar|json }}
-}
-```
-
-## The `yaml` filter
-
-Enabling the `serde-yaml` filter will enable the use of the `yaml` filter.
-This will output formatted JSON for any value that implements the required
-`Serialize` trait.
-
-```
-{{ foo|yaml }}
-```
\ No newline at end of file