Add a hint about not save-loading, and link to it from the "Back to .…

….." menu

data/core/help.cfg

@@ -25,7 +25,7 @@
     [section]
         id=gameplay
         title= _ "Gameplay"
-        topics=..gameplay,victory_and_defeat,recruit_and_recall,income_and_upkeep,hitpoints,advancement,movement,shroud_and_fog,combat,damage_types_and_resistance,orbs,time_of_day,healing,wrap_up
+        topics=..gameplay,victory_and_defeat,recruit_and_recall,income_and_upkeep,hitpoints,advancement,movement,shroud_and_fog,combat,damage_types_and_resistance,orbs,time_of_day,healing,saveload,wrap_up
     [/section]
 
     [section]
@@ -279,6 +279,23 @@ Normally you can undo a unit’s movement, as long as an event with a randomized
     [/topic]
     # wmllint: markcheck on
 
+    [topic]
+        id=saveload
+        title= _ "Save-loading"
+        text= _ "Random numbers are part of Wesnoth, attacks can fail and units can die due to bad luck. This is an expected part of the game, and one of the aims of the game is that a sufficiently skilled player should be able to complete all of the mainline campaigns, on hard, without needing to save-load. Going back to a previous turn to try a different strategy is a part of learning the game, but we recommend against reloading merely to try the same strategy again while hoping for better luck.
+
+One of the challenges of the game is to work out how to protect your heroes. Small risks quickly build up — if you have five important units, and they each have just a 1% chance of death each turn, you can <italic>text='expect'</italic> one of them to die about every 20 turns. So, you’ll rarely make it through a scenario without having it happen.
+
+The following points are under discussion on the forums. At least for the 1.15.x series before 1.16.0 please assume that the forum threads are more authoritative than the text on this page.
+
+In the mainline campaigns, on hard:
+• A sufficiently skilled player will have a good chance to win each scenario on the first time that they see that scenario, without foreknowledge of what will happen.
+• This assumes that the player picks up all of the clues given in the dialogue.
+• There are more experience points available than on easy, and the player will be able to train enough troops to cope with losing some L2 or L3 units.
+
+That said, it’s a game; the best way to play it is whichever way gives you the most enjoyment."
+    [/topic]
+
     # wmllint: markcheck off
     [topic]
         id=combat

data/themes/default.cfg

@@ -90,7 +90,7 @@
             title= _ "Back to..."
             id=menu-autosaves
             button=false
-            items=AUTOSAVES
+            items=AUTOSAVES,help-about-saveload
         [/menu]
 
         [menu]

src/hotkey/command_executor.cpp

@@ -247,6 +247,10 @@ bool command_executor::do_execute_command(const hotkey_command&  cmd, int /*inde
 		case HOTKEY_HELP:
 			show_help();
 			break;
+		case HOTKEY_HELP_ABOUT_SAVELOAD:
+			// although HOTKEY_HELP uses a virtual call to allow context-specific help, this one is already a specific topic
+			help::show_help("saveload");
+			break;
 		case HOTKEY_CHAT_LOG:
 			show_chat_log();
 			break;

src/hotkey/hotkey_command.cpp

@@ -275,6 +275,7 @@ std::array<hotkey_command_temp, HOTKEY_NULL - 1> master_hotkey_list {{
 	{ HOTKEY_SPEAK_ALLY, "speaktoally", N_("Speak to Ally"), false, scope_game, HKCAT_CHAT, "" },
 	{ HOTKEY_SPEAK_ALL, "speaktoall", N_("Speak to All"), false, scope_game, HKCAT_CHAT, "" },
 	{ HOTKEY_HELP, "help", N_("Help"), false, scope_game | scope_editor | scope_main, HKCAT_GENERAL, "" },
+	{ HOTKEY_HELP_ABOUT_SAVELOAD, "help-about-saveload", N_("Help about save-loading"), false, scope_game, HKCAT_GENERAL, N_("Hint: save-loading is unnecessary")},
 	{ HOTKEY_CHAT_LOG, "chatlog", N_("View Chat Log"), false, scope_game, HKCAT_CHAT, "" },
 	{ HOTKEY_USER_CMD, "command", N_("Enter User Command"), false, scope_game, HKCAT_CHAT, "" },
 	{ HOTKEY_CUSTOM_CMD, "customcommand", N_("Custom Command"), false, scope_game, HKCAT_CHAT, "" },

src/hotkey/hotkey_command.hpp

@@ -54,6 +54,7 @@ enum HOTKEY_COMMAND {
 	HOTKEY_LABEL_TEAM_TERRAIN, HOTKEY_LABEL_TERRAIN, HOTKEY_CLEAR_LABELS,HOTKEY_SHOW_ENEMY_MOVES, HOTKEY_BEST_ENEMY_MOVES,
 	HOTKEY_DELAY_SHROUD, HOTKEY_UPDATE_SHROUD, HOTKEY_CONTINUE_MOVE,
 	HOTKEY_SEARCH, HOTKEY_SPEAK_ALLY, HOTKEY_SPEAK_ALL, HOTKEY_HELP,
+	HOTKEY_HELP_ABOUT_SAVELOAD,
 	HOTKEY_CHAT_LOG, HOTKEY_LANGUAGE, HOTKEY_ANIMATE_MAP,
 
 	// Replay

src/hotkey/hotkey_handler.cpp

@@ -304,6 +304,7 @@ bool play_controller::hotkey_handler::can_execute_command(const hotkey::hotkey_c
 	case hotkey::HOTKEY_QUIT_TO_DESKTOP:
 	case hotkey::HOTKEY_SEARCH:
 	case hotkey::HOTKEY_HELP:
+	case hotkey::HOTKEY_HELP_ABOUT_SAVELOAD:
 	case hotkey::HOTKEY_USER_CMD:
 	case hotkey::HOTKEY_CUSTOM_CMD:
 	case hotkey::HOTKEY_AI_FORMULA: