Add "json: too many args" ui test

testing/Cargo.toml

@@ -17,6 +17,7 @@ phf = { version = "0.11", features = ["macros" ]}
 serde_json = { version = "1.0", optional = true }
 
 [dev-dependencies]
+rinja = { path = "../rinja", version = "0.13", features = ["serde_json"] }
 criterion = "0.5"
 trybuild = "1.0.76"
 

testing/tests/ui/json-too-many-args.rs

@@ -0,0 +1,10 @@
+#![cfg(feature = "serde_json")]
+
+use rinja::Template;
+
+#[derive(Template)]
+#[template(ext = "txt", source = "{{ 1|json(2, 3) }}")]
+struct OneTwoThree;
+
+fn main() {
+}

testing/tests/ui/json-too-many-args.stderr

@@ -0,0 +1,9 @@
+error: unexpected argument(s) in `json` filter
+ --> OneTwoThree.txt:1:3
+       "1|json(2, 3) }}"
+ --> tests/ui/json-too-many-args.rs:5:10
+  |
+5 | #[derive(Template)]
+  |          ^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)