fix rewrite omitting trailing slash, error msg update

internal/route/provider/provider.go

@@ -109,7 +109,7 @@ func (p *Provider) startRoute(parent task.Parent, r *R.Route) E.Error {
 	return nil
 }
 
-// Start implements*task.TaskStarter.
+// Start implements task.TaskStarter.
 func (p *Provider) Start(parent task.Parent) E.Error {
 	t := parent.Subtask("provider."+p.name, false)
 

internal/route/rules/validate.go

@@ -54,10 +54,14 @@ func validateURLPath(args []string) (any, E.Error) {
 		return nil, ErrExpectOneArg
 	}
 	p := args[0]
+	trailingSlash := len(p) > 1 && p[len(p)-1] == '/'
 	p, _, _ = strings.Cut(p, "#")
 	p = path.Clean(p)
 	if len(p) == 0 {
-		return "/", nil
+		return nil, ErrInvalidArguments.Withf("empty path")
+	}
+	if trailingSlash {
+		p += "/"
 	}
 	if p[0] != '/' {
 		return nil, ErrInvalidArguments.Withf("must start with /")

internal/utils/serialization.go

@@ -180,7 +180,7 @@ func Deserialize(src SerializedObject, dst any) E.Error {
 		}
 		return errs.Error()
 	default:
-		return ErrUnsupportedConversion.Subject("deserialize to " + dstT.String())
+		return ErrUnsupportedConversion.Subject("mapping to " + dstT.String())
 	}
 }
 
@@ -346,10 +346,11 @@ func ConvertString(src string, dst reflect.Value) (convertible bool, convErr E.E
 		return true, E.From(parser.Parse(src))
 	}
 	// yaml like
-	isMultiline := strings.ContainsRune(src, '\n')
 	var tmp any
 	switch dst.Kind() {
 	case reflect.Slice:
+		src = strings.TrimSpace(src)
+		isMultiline := strings.ContainsRune(src, '\n')
 		// one liner is comma separated list
 		if !isMultiline {
 			values := strutils.CommaSeperatedList(src)