fix: Correct typos, improve documentation clarity, and remove dead code (#4511)

* fix: correct typos and improve documentation clarity

- Fix typo "Oupps" to "Oops" in recovery test panic messages
- Fix confusing documentation in Bind() and ShouldBind() methods
  that incorrectly stated "JSON or XML as a JSON input"
- Remove double period in StaticFileFS documentation comment
- Remove unused ErrorTypeNu constant that had duplicate comment
  with ErrorTypeAny and was never used in the codebase

* tech: Fix the pull request routing link

CONTRIBUTING.md

@@ -36,6 +36,6 @@ Please ensure your pull request meets the following requirements:
 - All tests pass in available continuous integration systems (e.g., GitHub Actions).
 - Add or modify tests to cover your code changes.
 - If your pull request introduces a new feature, document it in [`docs/doc.md`](docs/doc.md), not in the README.
-- Follow the checklist in the [Pull Request Template](.github/PULL_REQUEST_TEMPLATE.md:1).
+- Follow the checklist in the [Pull Request Template](.github/PULL_REQUEST_TEMPLATE.md).
 
 Thank you for contributing!

context.go

@@ -751,8 +751,8 @@ func (c *Context) SaveUploadedFile(file *multipart.FileHeader, dst string, perm
 //	"application/json" --> JSON binding
 //	"application/xml"  --> XML binding
 //
-// It parses the request's body as JSON if Content-Type == "application/json" using JSON or XML as a JSON input.
+// It parses the request's body based on the Content-Type (e.g., JSON or XML).
-// It decodes the json payload into the struct specified as a pointer.
+// It decodes the payload into the struct specified as a pointer.
 // It writes a 400 error and sets Content-Type header "text/plain" in the response if input is not valid.
 func (c *Context) Bind(obj any) error {
 	b := binding.Default(c.Request.Method, c.ContentType())
@@ -832,8 +832,8 @@ func (c *Context) MustBindWith(obj any, b binding.Binding) error {
 //	"application/json" --> JSON binding
 //	"application/xml"  --> XML binding
 //
-// It parses the request's body as JSON if Content-Type == "application/json" using JSON or XML as a JSON input.
+// It parses the request's body based on the Content-Type (e.g., JSON or XML).
-// It decodes the json payload into the struct specified as a pointer.
+// It decodes the payload into the struct specified as a pointer.
 // Like c.Bind() but this method does not set the response status code to 400 or abort if input is not valid.
 func (c *Context) ShouldBind(obj any) error {
 	b := binding.Default(c.Request.Method, c.ContentType())

errors.go

@@ -26,8 +26,6 @@ const (
 	ErrorTypePublic ErrorType = 1 << 1
 	// ErrorTypeAny indicates any other error.
 	ErrorTypeAny ErrorType = 1<<64 - 1
-	// ErrorTypeNu indicates any other error.
-	ErrorTypeNu = 2
 )
 
 // Error represents a error's specification.

recovery_test.go

@@ -22,7 +22,7 @@ func TestPanicClean(t *testing.T) {
 	router.Use(RecoveryWithWriter(buffer))
 	router.GET("/recovery", func(c *Context) {
 		c.AbortWithStatus(http.StatusBadRequest)
-		panic("Oupps, Houston, we have a problem")
+		panic("Oops, Houston, we have a problem")
 	})
 	// RUN
 	w := PerformRequest(router, http.MethodGet, "/recovery",
@@ -52,14 +52,14 @@ func TestPanicInHandler(t *testing.T) {
 	router := New()
 	router.Use(RecoveryWithWriter(buffer))
 	router.GET("/recovery", func(_ *Context) {
-		panic("Oupps, Houston, we have a problem")
+		panic("Oops, Houston, we have a problem")
 	})
 	// RUN
 	w := PerformRequest(router, http.MethodGet, "/recovery")
 	// TEST
 	assert.Equal(t, http.StatusInternalServerError, w.Code)
 	assert.Contains(t, buffer.String(), "panic recovered")
-	assert.Contains(t, buffer.String(), "Oupps, Houston, we have a problem")
+	assert.Contains(t, buffer.String(), "Oops, Houston, we have a problem")
 	assert.Contains(t, buffer.String(), t.Name())
 	assert.NotContains(t, buffer.String(), "GET /recovery")
 
@@ -80,7 +80,7 @@ func TestPanicWithAbort(t *testing.T) {
 	router.Use(RecoveryWithWriter(nil))
 	router.GET("/recovery", func(c *Context) {
 		c.AbortWithStatus(http.StatusBadRequest)
-		panic("Oupps, Houston, we have a problem")
+		panic("Oops, Houston, we have a problem")
 	})
 	// RUN
 	w := PerformRequest(router, http.MethodGet, "/recovery")
@@ -162,14 +162,14 @@ func TestCustomRecoveryWithWriter(t *testing.T) {
 	}
 	router.Use(CustomRecoveryWithWriter(buffer, handleRecovery))
 	router.GET("/recovery", func(_ *Context) {
-		panic("Oupps, Houston, we have a problem")
+		panic("Oops, Houston, we have a problem")
 	})
 	// RUN
 	w := PerformRequest(router, http.MethodGet, "/recovery")
 	// TEST
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Contains(t, buffer.String(), "panic recovered")
-	assert.Contains(t, buffer.String(), "Oupps, Houston, we have a problem")
+	assert.Contains(t, buffer.String(), "Oops, Houston, we have a problem")
 	assert.Contains(t, buffer.String(), t.Name())
 	assert.NotContains(t, buffer.String(), "GET /recovery")
 
@@ -181,7 +181,7 @@ func TestCustomRecoveryWithWriter(t *testing.T) {
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Contains(t, buffer.String(), "GET /recovery")
 
-	assert.Equal(t, strings.Repeat("Oupps, Houston, we have a problem", 2), errBuffer.String())
+	assert.Equal(t, strings.Repeat("Oops, Houston, we have a problem", 2), errBuffer.String())
 
 	SetMode(TestMode)
 }
@@ -197,14 +197,14 @@ func TestCustomRecovery(t *testing.T) {
 	}
 	router.Use(CustomRecovery(handleRecovery))
 	router.GET("/recovery", func(_ *Context) {
-		panic("Oupps, Houston, we have a problem")
+		panic("Oops, Houston, we have a problem")
 	})
 	// RUN
 	w := PerformRequest(router, http.MethodGet, "/recovery")
 	// TEST
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Contains(t, buffer.String(), "panic recovered")
-	assert.Contains(t, buffer.String(), "Oupps, Houston, we have a problem")
+	assert.Contains(t, buffer.String(), "Oops, Houston, we have a problem")
 	assert.Contains(t, buffer.String(), t.Name())
 	assert.NotContains(t, buffer.String(), "GET /recovery")
 
@@ -216,7 +216,7 @@ func TestCustomRecovery(t *testing.T) {
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Contains(t, buffer.String(), "GET /recovery")
 
-	assert.Equal(t, strings.Repeat("Oupps, Houston, we have a problem", 2), errBuffer.String())
+	assert.Equal(t, strings.Repeat("Oops, Houston, we have a problem", 2), errBuffer.String())
 
 	SetMode(TestMode)
 }
@@ -232,14 +232,14 @@ func TestRecoveryWithWriterWithCustomRecovery(t *testing.T) {
 	}
 	router.Use(RecoveryWithWriter(DefaultErrorWriter, handleRecovery))
 	router.GET("/recovery", func(_ *Context) {
-		panic("Oupps, Houston, we have a problem")
+		panic("Oops, Houston, we have a problem")
 	})
 	// RUN
 	w := PerformRequest(router, http.MethodGet, "/recovery")
 	// TEST
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Contains(t, buffer.String(), "panic recovered")
-	assert.Contains(t, buffer.String(), "Oupps, Houston, we have a problem")
+	assert.Contains(t, buffer.String(), "Oops, Houston, we have a problem")
 	assert.Contains(t, buffer.String(), t.Name())
 	assert.NotContains(t, buffer.String(), "GET /recovery")
 
@@ -251,7 +251,7 @@ func TestRecoveryWithWriterWithCustomRecovery(t *testing.T) {
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Contains(t, buffer.String(), "GET /recovery")
 
-	assert.Equal(t, strings.Repeat("Oupps, Houston, we have a problem", 2), errBuffer.String())
+	assert.Equal(t, strings.Repeat("Oops, Houston, we have a problem", 2), errBuffer.String())
 
 	SetMode(TestMode)
 }

routergroup.go

@@ -169,7 +169,7 @@ func (group *RouterGroup) StaticFile(relativePath, filepath string) IRoutes {
 	})
 }
 
-// StaticFileFS works just like `StaticFile` but a custom `http.FileSystem` can be used instead..
+// StaticFileFS works just like `StaticFile` but a custom `http.FileSystem` can be used instead.
 // router.StaticFileFS("favicon.ico", "./resources/favicon.ico", Dir{".", false})
 // Gin by default uses: gin.Dir()
 func (group *RouterGroup) StaticFileFS(relativePath, filepath string, fs http.FileSystem) IRoutes {