commands: replace EXPECTED_LESS_THAN with EXPECTED_AT_MOST

This makes it a bit more obvious what the expected number of arguments is.

include/sway/commands.h

@@ -40,7 +40,7 @@ struct cmd_results {
 
 enum expected_args {
 	EXPECTED_AT_LEAST,
-	EXPECTED_LESS_THAN,
+	EXPECTED_AT_MOST,
 	EXPECTED_EQUAL_TO
 };
 

sway/commands.c

@@ -25,9 +25,9 @@ struct cmd_results *checkarg(int argc, const char *name, enum expected_args type
 			error_name = "at least ";
 		}
 		break;
-	case EXPECTED_LESS_THAN:
-		if (argc >= val) {
-			error_name = "less than ";
+	case EXPECTED_AT_MOST:
+		if (argc > val) {
+			error_name = "at most ";
 		}
 		break;
 	case EXPECTED_EQUAL_TO:

sway/commands/bar/hidden_state.c

@@ -40,7 +40,7 @@ struct cmd_results *bar_cmd_hidden_state(int argc, char **argv) {
 	if ((error = checkarg(argc, "hidden_state", EXPECTED_AT_LEAST, 1))) {
 		return error;
 	}
-	if ((error = checkarg(argc, "hidden_state", EXPECTED_LESS_THAN, 3))) {
+	if ((error = checkarg(argc, "hidden_state", EXPECTED_AT_MOST, 2))) {
 		return error;
 	}
 	if (config->reading && argc > 1) {

sway/commands/bar/mode.c

@@ -41,7 +41,7 @@ struct cmd_results *bar_cmd_mode(int argc, char **argv) {
 	if ((error = checkarg(argc, "mode", EXPECTED_AT_LEAST, 1))) {
 		return error;
 	}
-	if ((error = checkarg(argc, "mode", EXPECTED_LESS_THAN, 3))) {
+	if ((error = checkarg(argc, "mode", EXPECTED_AT_MOST, 2))) {
 		return error;
 	}
 	if (config->reading && argc > 1) {

sway/commands/fullscreen.c

@@ -9,7 +9,7 @@
 
 struct cmd_results *cmd_fullscreen(int argc, char **argv) {
 	struct cmd_results *error = NULL;
-	if ((error = checkarg(argc, "fullscreen", EXPECTED_LESS_THAN, 2))) {
+	if ((error = checkarg(argc, "fullscreen", EXPECTED_AT_MOST, 1))) {
 		return error;
 	}
 	struct sway_node *node = config->handler_context.node;