Update vlib/os/os.v

match looks more like idiomatic v than if-else-if-...-else

Co-authored-by: Turiiya <34311583+ttytm@users.noreply.github.com>

vlib/os/os.v

@@ -610,14 +610,11 @@ pub fn join_path(base string, dirs ...string) string {
 pub fn join_path_single(base string, elem string) string {
 	// TODO: deprecate this and make it `return os.join_path(base, elem)`,
 	// when freeing variadic args vs ...arr is solved in the compiler
-	if base != '' && elem != '' {
-		return '${base}${path_separator}${elem}'
-	} else if base != '' {
-		return base
-	} else if elem != '' {
-		return elem
-	} else {
-		return ''
+	return match true {
+		base != '' && elem != '' { '${base}${path_separator}${elem}' }
+		base != '' { base }
+		elem != '' { elem }
+		else { '' }
 	}
 }