kconfig: some small fixes

- fix a typo in documentation
- fix a typo in a printk on error
- fix comments in dialog_inputbox()

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/lxdialog/inputbox.c b/scripts/kconfig/lxdialog/inputbox.c
index 616c601..dd8e587 100644
--- a/scripts/kconfig/lxdialog/inputbox.c
+++ b/scripts/kconfig/lxdialog/inputbox.c
@@ -180,7 +180,7 @@
 		case KEY_LEFT:
 			switch (button) {
 			case -1:
-				button = 1;	/* Indicates "Cancel" button is selected */
+				button = 1;	/* Indicates "Help" button is selected */
 				print_buttons(dialog, height, width, 1);
 				break;
 			case 0:
@@ -204,7 +204,7 @@
 				print_buttons(dialog, height, width, 0);
 				break;
 			case 0:
-				button = 1;	/* Indicates "Cancel" button is selected */
+				button = 1;	/* Indicates "Help" button is selected */
 				print_buttons(dialog, height, width, 1);
 				break;
 			case 1:
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 21bfb3d..62e3f15 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -197,7 +197,7 @@
 			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 			    prop->expr->type != E_SYMBOL)
 				prop_warn(prop,
-				    "default for config symbol '%'"
+				    "default for config symbol '%s'"
 				    " must be a single symbol", sym->name);
 			break;
 		case P_SELECT: