Correct typos in comments and doc

README.md

@@ -48,7 +48,7 @@ The package provides `Analyzer` instance that can be used with
 [go/analysis](https://pkg.go.dev/golang.org/x/tools/go/analysis) API.
 
 Currently supported flags are `blank`, `assert`, `exclude`, and `excludeonly`.
-Just as the API itself, the analyzer is exprimental and may change in the
+Just as the API itself, the analyzer is experimental and may change in the
 future.
 
 ## Excluding functions

errcheck/errcheck.go

@@ -205,7 +205,7 @@ func (c *Checker) CheckPackage(pkg *packages.Package) Result {
 
 	ignore := map[string]*regexp.Regexp{}
 	// Apply SymbolRegexpsByPackage first so that if the same path appears in
-	// Packages, a more narrow regexp will be superceded by dotStar below.
+	// Packages, a more narrow regexp will be superseded by dotStar below.
 	if regexps := c.Exclusions.SymbolRegexpsByPackage; regexps != nil {
 		for pkg, re := range regexps {
 			// TODO warn if previous entry overwritten?
@@ -337,7 +337,7 @@ func (v *visitor) selectorName(call *ast.CallExpr) string {
 // names are returned. If the function is package-qualified (like "fmt.Printf()")
 // then just that function's fullName is returned.
 //
-// Otherwise, we walk through all the potentially embeddded interfaces of the receiver
+// Otherwise, we walk through all the potentially embedded interfaces of the receiver
 // the collect a list of type-qualified function names that we will check.
 func (v *visitor) namesForExcludeCheck(call *ast.CallExpr) []string {
 	sel, fn, ok := v.selectorAndFunc(call)

testdata/embedded_interface.go

@@ -10,7 +10,7 @@ type T struct{}
 func (t T) X() {}
 
 type A interface {
-	B // embeded
+	B // embedded
 }
 
 type B = interface { // B is not a defined type