(cosmetic) fix code tabs

Codeblocks made some of my tabs into spaces and I had to fix it.
Also, forgot to mention this before, but I cleaned up some of the code
for astarsearch.cpp as well.

src/config_cache.cpp

@@ -371,7 +371,7 @@ namespace game_config {
 	{
 		if(active_map_.empty())
 		{
-            active_map_.insert(defines_map.begin(), defines_map.end());
+			active_map_.insert(defines_map.begin(), defines_map.end());
 			if ( get_state() == NEW)
 				state_ = ACTIVE;
 		 }

src/game_preferences.cpp

@@ -105,10 +105,10 @@ manager::manager() :
 	}
 
 	const std::vector<std::string> v (utils::split(preferences::get("encountered_units")));
-    encountered_units_set.insert(v.begin(), v.end());
+	encountered_units_set.insert(v.begin(), v.end());
 
 	const t_translation::t_list terrain (t_translation::read_list(preferences::get("encountered_terrain_list")));
-    encountered_terrains_set.insert(terrain.begin(), terrain.end());
+	encountered_terrains_set.insert(terrain.begin(), terrain.end());
 
 	if (const config &history = preferences::get_child("history"))
 	{
@@ -1047,7 +1047,7 @@ void encounter_recruitable_units(std::vector<team>& teams){
 	for (std::vector<team>::iterator help_team_it = teams.begin();
 		help_team_it != teams.end(); ++help_team_it) {
 		help_team_it->log_recruitable();
-        encountered_units_set.insert(help_team_it->recruits().begin(), help_team_it->recruits().end());
+		encountered_units_set.insert(help_team_it->recruits().begin(), help_team_it->recruits().end());
 	}
 }
 

src/help.cpp

@@ -999,10 +999,10 @@ void parse_config_internal(const config *help_cfg, const config *section_cfg,
 			  ,std::back_inserter(sec.topics),title_less());
 		}
 		else {
-            sec.topics.insert(sec.topics.end(),
-                topics.begin(), topics.end());
-            sec.topics.insert(sec.topics.end(),
-                generated_topics.begin(), generated_topics.end());
+			sec.topics.insert(sec.topics.end(),
+				topics.begin(), topics.end());
+			sec.topics.insert(sec.topics.end(),
+				generated_topics.begin(), generated_topics.end());
 		}
 	}
 }

src/multiplayer_create.cpp

@@ -516,7 +516,7 @@ std::string create::select_campaign_difficulty()
 	if(!difficulties.empty()) {
 		int difficulty = 0;
 		if(difficulty_options.size() != difficulties.size()) {
-            difficulty_options = difficulties;
+			difficulty_options = difficulties;
 		}
 
 		gui2::tcampaign_difficulty dlg(difficulty_options);

src/sdl_utils.cpp

@@ -257,7 +257,7 @@ surface stretch_surface_horizontal(
 	surface dst(create_neutral_surface(w, surf->h));
 
 	surface src(make_neutral_surface(surf));
-	// Now both surfacedvances fires when the advancement path is already chosen, which in partics are always in the "neutral" pixel format
+	// Now both surfaces are always in the "neutral" pixel format
 
 	if(src == NULL || dst == NULL) {
 		std::cerr << "Could not create surface to scale onto\n";

src/terrain_filter.cpp

@@ -634,7 +634,7 @@ void terrain_filter::get_locations(std::set<map_location>& locs, bool with_borde
 			get_tiles_radius(*resources::game_map, xy_vector, radius, locs, with_border);
 		}
 	} else {
-        locs.insert(match_set.begin(), match_set.end());
+		locs.insert(match_set.begin(), match_set.end());
 	}
 }