Refactor TestSanitizeController for improved clarity

- Updated namespace for consistency.
- Changed constructor and method parameters to non-nullable strings.
- Enhanced method signatures for `Sanitize` and `Encoder`.
- Improved overall class structure and formatting for better readability.

EnvelopeGenerator.Web/Controllers/Test/TestSanitizeController.cs

@@ -2,36 +2,34 @@
 using Microsoft.AspNetCore.Mvc;
 using System.Text.Encodings.Web;
 
-namespace EnvelopeGenerator.Web.Controllers.Test
+namespace EnvelopeGenerator.Web.Controllers.Test;
+
+[ApiController]
+[Route("api/test/[controller]")]
+public class TestSanitizeController : ControllerBase
 {
-    [ApiController]
-    [Route("api/test/[controller]")]
-    public class TestSanitizeController : ControllerBase
+    private readonly HtmlEncoder _htmlEncoder;
+    private readonly HtmlSanitizer _sanitizer;
+
+    public TestSanitizeController(HtmlEncoder htmlEncoder, HtmlSanitizer sanitizer)
     {
-        private readonly HtmlEncoder _htmlEncoder;
-        private readonly HtmlSanitizer _sanitizer;
-
-        public TestSanitizeController(HtmlEncoder htmlEncoder, HtmlSanitizer sanitizer)
-        {
-            _htmlEncoder = htmlEncoder;
-            _sanitizer = sanitizer;
-        }
-
-        [HttpGet("sanitize")]
-        public IActionResult Sanitize([FromQuery] string? input = null) => Ok(new
-        {
-            input,
-            Sanitized = _sanitizer.Sanitize(input),
-            SanitizedDocument = _sanitizer.SanitizeDocument(input),
-            SanitizedDom = _sanitizer.SanitizeDom(input)
-        });
-
-
-        [HttpGet("encode")]
-        public IActionResult Encoder([FromQuery] string? input = null) => Ok(new
-        {
-            input,
-            Encoded = _htmlEncoder.Encode(input)
-        });
+        _htmlEncoder = htmlEncoder;
+        _sanitizer = sanitizer;
     }
-}
+
+    [HttpGet("sanitize")]
+    public IActionResult Sanitize([FromQuery] string input) => Ok(new
+    {
+        input,
+        Sanitized = _sanitizer.Sanitize(input),
+        SanitizedDocument = _sanitizer.SanitizeDocument(input),
+        SanitizedDom = _sanitizer.SanitizeDom(input)
+    });
+
+    [HttpGet("encode")]
+    public IActionResult Encoder([FromQuery] string input) => Ok(new
+    {
+        input,
+        Encoded = _htmlEncoder.Encode(input)
+    });
+}