all: modernize (#5498)

* modernize string cut usage

* modernize string cut prefix usage

* modernize slices helper usage

* modernize min and max usage

* modernize loop variable copies

* modernize integer range loops

* modernize map copy loops

* modernize go types iterator usage

* modernize empty interface usage

* modernize atomic type usage

* modernize string builders

* modernize string split iteration

* modernize remaining loop variable copies

* modernize usb cdc min usage

* modernize src integer range loops

* modernize example empty interface usage

* modernize src min and max usage

* modernize src integer range loops

* modernize src empty interface usage

* modernize src atomic type usage

* modernize reflect type lookups

* modernize review nits

cgo/cgo.go

@@ -40,7 +40,7 @@ type cgoPackage struct {
 	tokenFiles      map[string]*token.File
 	definedGlobally map[string]ast.Node
 	noescapingFuncs map[string]*noescapingFunc // #cgo noescape lines
-	anonDecls       map[interface{}]string
+	anonDecls       map[any]string
 	cflags          []string // CFlags from #cgo lines
 	ldflags         []string // LDFlags from #cgo lines
 	visitedFiles    map[string][]byte
@@ -259,7 +259,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 		tokenFiles:      map[string]*token.File{},
 		definedGlobally: map[string]ast.Node{},
 		noescapingFuncs: map[string]*noescapingFunc{},
-		anonDecls:       map[interface{}]string{},
+		anonDecls:       map[any]string{},
 		visitedFiles:    map[string][]byte{},
 	}
 
@@ -302,7 +302,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 	// Find `import "C"` C fragments in the file.
 	p.cgoHeaders = make([]string, len(files)) // combined CGo header fragment for each file
 	for i, f := range files {
-		var cgoHeader string
+		var cgoHeader strings.Builder
 		for i := 0; i < len(f.Decls); i++ {
 			decl := f.Decls[i]
 			genDecl, ok := decl.(*ast.GenDecl)
@@ -337,7 +337,8 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 			// Iterate through all parts of the CGo header. Note that every //
 			// line is a new comment.
 			position := fset.Position(genDecl.Doc.Pos())
-			fragment := fmt.Sprintf("# %d %#v\n", position.Line, position.Filename)
+			var fragment strings.Builder
+			fragment.WriteString(fmt.Sprintf("# %d %#v\n", position.Line, position.Filename))
 			for _, comment := range genDecl.Doc.List {
 				// Find all #cgo lines, extract and use their contents, and
 				// replace the lines with spaces (to preserve locations).
@@ -354,12 +355,13 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 				} else { // comment
 					c = "  " + c[2:len(c)-2]
 				}
-				fragment += c + "\n"
+				fragment.WriteString(c)
+				fragment.WriteByte('\n')
 			}
-			cgoHeader += fragment
+			cgoHeader.WriteString(fragment.String())
 		}
 
-		p.cgoHeaders[i] = cgoHeader
+		p.cgoHeaders[i] = cgoHeader.String()
 	}
 
 	// Define CFlags that will be used while parsing the package.
@@ -1217,7 +1219,7 @@ func getPos(node ast.Node) token.Pos {
 // getUnnamedDeclName creates a name (with the given prefix) for the given C
 // declaration. This is used for structs, unions, and enums that are often
 // defined without a name and used in a typedef.
-func (p *cgoPackage) getUnnamedDeclName(prefix string, itf interface{}) string {
+func (p *cgoPackage) getUnnamedDeclName(prefix string, itf any) string {
 	if name, ok := p.anonDecls[itf]; ok {
 		return name
 	}