style: modernize to splitseq, cut, min, maps.copy and range-over-int

debug/breakpoint.go

@@ -5,6 +5,8 @@
 
 package debug
 
+import "strings"
+
 import "fmt"
 
 // Breakpoint is one INT3 breakpoint in the debuggee.
@@ -119,7 +121,7 @@ func (bm *Breakpoints) Info() string {
 	if len(bm.bps) == 0 {
 		return "no breakpoints set\n"
 	}
-	result := ""
+	var result strings.Builder
 	i := 0
 	for _, bp := range bm.bps {
 		i++
@@ -135,9 +137,9 @@ func (bm *Breakpoints) Info() string {
 		if bp.Cond != nil {
 			cond = fmt.Sprintf(" if %s %s %#x", bp.Cond.Reg, bp.Cond.Op, bp.Cond.Value)
 		}
-		result += fmt.Sprintf("  %d: %s at %#x [%s, %d hits]%s\n", i, label, bp.Addr, status, bp.hits, cond)
+		result.WriteString(fmt.Sprintf("  %d: %s at %#x [%s, %d hits]%s\n", i, label, bp.Addr, status, bp.hits, cond))
 	}
-	return result
+	return result.String()
 }
 
 // Clear removes the breakpoint at addr, restoring the original byte.