Trim trailing newlines from command representations

exec.go

@@ -10,7 +10,7 @@ import (
 )
 
 func run(cmd io.Reader) error {
-	fmt.Fprintln(Trace, cmd)
+	fmt.Fprintln(Trace, strings.TrimRight(fmt.Sprintf("%v", cmd), "\n"))
 	a, ok := cmd.(Attacher)
 	if !ok {
 		// If this command does not implement Attacher, stream it to stdout
@@ -32,7 +32,7 @@ func run(cmd io.Reader) error {
 }
 
 func get(cmd io.Reader) (Result, error) {
-	fmt.Fprintln(Trace, cmd)
+	fmt.Fprintln(Trace, strings.TrimRight(fmt.Sprintf("%v", cmd), "\n"))
 
 	var r Result
 	var wg errgroup.Group

pipe.go

@@ -22,7 +22,7 @@ func pipeTrace(src io.Reader, mid []io.ReadWriter) {
 			fmt.Fprintf(Trace, " | ")
 		}
 		if str, ok := e.(fmt.Stringer); ok {
-			fmt.Fprint(Trace, str.String())
+			fmt.Fprint(Trace, strings.TrimRight(str.String(), "\n"))
 		} else {
 			fmt.Fprintf(Trace, "<%T>", e)
 		}
@@ -70,7 +70,7 @@ func MustPipe(src io.Reader, cmd ...io.ReadWriter) {
 				e = cmd[i]
 			}
 			if str, ok := e.(fmt.Stringer); ok {
-				b.WriteString(str.String())
+				b.WriteString(strings.TrimRight(str.String(), "\n"))
 			} else {
 				fmt.Fprintf(&b, "<%T>", e)
 			}
@@ -133,7 +133,7 @@ func MustGetPipe(src io.Reader, cmd ...io.ReadWriter) Result {
 				e = cmd[i]
 			}
 			if str, ok := e.(fmt.Stringer); ok {
-				b.WriteString(str.String())
+				b.WriteString(strings.TrimRight(str.String(), "\n"))
 			} else {
 				fmt.Fprintf(&b, "<%T>", e)
 			}