Handle double instructions correctly when deleting stations/depots/etc.

Fix some whitespace and comment typos.

src/tracerestrict.cpp

@@ -1084,6 +1084,7 @@ void TraceRestrictRemoveDestinationID(TraceRestrictOrderCondAuxField type, uint1
 					SetTraceRestrictValueDefault(item, TRVT_ORDER); // this updates the instruction in-place
 				}
 			}
+			if (IsTraceRestrictDoubleItem(item)) i++;
 		}
 	}
 

src/tracerestrict.h

@@ -99,7 +99,7 @@ enum TraceRestrictItemType {
 	TRIT_PF_PENALTY               = 2,    ///< Add to pathfinder penalty
 	TRIT_RESERVE_THROUGH          = 3,    ///< Reserve through PBS signal
 
-	TRIT_COND_BEGIN               = 8,    ///< Start of conditional item types, note that this has the save value as TRIT_COND_ENDIF
+	TRIT_COND_BEGIN               = 8,    ///< Start of conditional item types, note that this has the same value as TRIT_COND_ENDIF
 	TRIT_COND_ENDIF               = 8,    ///< This is an endif block or an else block
 	TRIT_COND_UNDEFINED           = 9,    ///< This condition has no type defined (evaluate as false)
 	TRIT_COND_TRAIN_LENGTH        = 10,   ///< Test train length

src/tracerestrict_gui.cpp

@@ -123,7 +123,7 @@ static const StringID _program_insert_str[] = {
 	INVALID_STRING_ID
 };
 static const uint32 _program_insert_else_hide_mask    = 8;     ///< disable bitmask for else
-static const uint32 _program_insert_or_if_hide_mask   = 4;     ///< disable bitmask for elif
+static const uint32 _program_insert_or_if_hide_mask   = 4;     ///< disable bitmask for orif
 static const uint32 _program_insert_else_if_hide_mask = 2;     ///< disable bitmask for elif
 static const uint _program_insert_val[] = {
 	TRIT_COND_UNDEFINED,                               // if block
@@ -1418,7 +1418,7 @@ private:
 		this->RaiseWidget(TR_WIDGET_VALUE_DEST);
 		this->RaiseWidget(TR_WIDGET_VALUE_SIGNAL);
 
-		NWidgetStacked *left_2_sel   = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_LEFT_2);
+		NWidgetStacked *left_2_sel = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_LEFT_2);
 		NWidgetStacked *left_sel   = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_LEFT);
 		NWidgetStacked *middle_sel = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_MIDDLE);
 		NWidgetStacked *right_sel  = this->GetWidget<NWidgetStacked>(TR_WIDGET_SEL_TOP_RIGHT);