Improve ExaminedEvent to handle newlines for you with helper methods.

Content.Client/Construction/ConstructionSystem.cs

@@ -65,7 +65,7 @@ namespace Content.Client.Construction
         {
             if (component.Prototype == null) return;
 
-            args.Message.AddMarkup(Loc.GetString(
+            args.PushMarkup(Loc.GetString(
                 "construction-ghost-examine-message",
                 ("name", component.Prototype.Name)));
 

Content.Server/Construction/ConstructionSystem.cs

@@ -58,10 +58,9 @@ namespace Content.Server.Construction
         {
             if (component.Target != null)
             {
-                args.Message.AddMarkup(
+                args.PushMarkup(Loc.GetString(
-                    Loc.GetString(
                     "construction-component-to-create-header",
-                        ("targetName", component.Target.Name)) + "\n");
+                    ("targetName", component.Target.Name)));
             }
 
             if (component.Edge == null && component.TargetNextEdge != null)

Content.Server/Dice/DiceSystem.cs

@@ -59,10 +59,8 @@ namespace Content.Server.Dice
         private void OnExamined(EntityUid uid, DiceComponent dice, ExaminedEvent args)
         {
             //No details check, since the sprite updates to show the side.
-            args.Message.PushNewline();
+            args.PushMarkup(Loc.GetString("dice-component-on-examine-message-part-1", ("sidesAmount", dice.Sides)));
-            args.Message.AddMarkup(Loc.GetString("dice-component-on-examine-message-part-1", ("sidesAmount", dice.Sides)));
+            args.PushMarkup(Loc.GetString("dice-component-on-examine-message-part-2", ("currentSide", dice.CurrentSide)));
-            args.Message.PushNewline();
-            args.Message.AddMarkup(Loc.GetString("dice-component-on-examine-message-part-2", ("currentSide", dice.CurrentSide)));
         }
     }
 }

Content.Server/Flash/FlashSystem.cs

@@ -169,15 +169,13 @@ namespace Content.Server.Flash
         {
             if (!comp.HasUses)
             {
-                args.Message.AddText("\n");
+                args.PushText(Loc.GetString("flash-component-examine-empty"));
-                args.Message.AddText(Loc.GetString("flash-component-examine-empty"));
                 return;
             }
 
             if (args.IsInDetailsRange)
             {
-                args.Message.AddText("\n");
+                args.PushMarkup(
-                args.Message.AddMarkup(
                     Loc.GetString(
                         "flash-component-examine-detail-count",
                         ("count", comp.Uses),

Content.Server/Fluids/PuddleSystem.cs

@@ -32,7 +32,7 @@ namespace Content.Server.Fluids
         {
             if (ComponentManager.TryGetComponent<SlipperyComponent>(uid, out var slippery) && slippery.Slippery)
             {
-                args.Message.AddText(Loc.GetString("puddle-component-examine-is-slipper-text"));
+                args.PushText(Loc.GetString("puddle-component-examine-is-slipper-text"));
             }
         }
 

Content.Server/Ghost/GhostSystem.cs

@@ -86,7 +86,7 @@ namespace Content.Server.Ghost
                 ? Loc.GetString("comp-ghost-examine-time-minutes", ("minutes", timeSinceDeath.Minutes))
                 : Loc.GetString("comp-ghost-examine-time-seconds", ("seconds", timeSinceDeath.Seconds));
 
-            args.Message.AddMarkup(deathTimeInfo);
+            args.PushMarkup(deathTimeInfo);
         }
 
         private void OnMindRemovedMessage(EntityUid uid, GhostComponent component, MindRemovedMessage args)

Content.Server/Hands/Systems/HandsSystem.cs

@@ -192,7 +192,7 @@ namespace Content.Server.Hands
         {
             foreach (var inhand in component.GetAllHeldItems())
             {
-                args.Message.AddText($"\n{Loc.GetString("comp-hands-examine", ("user", component.Owner), ("item", inhand.Owner))}");
+                args.PushText(Loc.GetString("comp-hands-examine", ("user", component.Owner), ("item", inhand.Owner)));
             }
         }
 

Content.Server/Lock/LockSystem.cs

@@ -52,8 +52,7 @@ namespace Content.Server.Lock
 
         private void OnExamined(EntityUid eUI, LockComponent lockComp, ExaminedEvent args)
         {
-            args.Message.AddText("\n");
+            args.PushText(Loc.GetString(lockComp.Locked
-            args.Message.AddText(Loc.GetString(lockComp.Locked
                     ? "lock-comp-on-examined-is-locked"
                     : "lock-comp-on-examined-is-unlocked",
                 ("entityName", lockComp.Owner.Name)));

Content.Server/Stunnable/StunbatonSystem.cs

@@ -108,11 +108,10 @@ namespace Content.Server.Stunnable
 
         private void OnExamined(EntityUid uid, StunbatonComponent comp, ExaminedEvent args)
         {
-            args.Message.AddText("\n");
             var msg = comp.Activated
                 ? Loc.GetString("comp-stunbaton-examined-on")
                 : Loc.GetString("comp-stunbaton-examined-off");
-            args.Message.AddMarkup(msg);
+            args.PushMarkup(msg);
         }
 
         private void StunEntity(IEntity entity, StunbatonComponent comp)

Content.Server/Tools/WelderSystem.cs

@@ -28,16 +28,16 @@ namespace Content.Server.Tools
         {
             if (component.WelderLit)
             {
-                args.Message.AddMarkup(Loc.GetString("welder-component-on-examine-welder-lit-message") + "\n");
+                args.PushMarkup(Loc.GetString("welder-component-on-examine-welder-lit-message"));
             }
             else
             {
-                args.Message.AddText(Loc.GetString("welder-component-on-examine-welder-not-lit-message") + "\n");
+                args.PushMarkup(Loc.GetString("welder-component-on-examine-welder-not-lit-message"));
             }
 
             if (args.IsInDetailsRange)
             {
-                args.Message.AddMarkup(Loc.GetString("welder-component-on-examine-detailed-message",
+                args.PushMarkup(Loc.GetString("welder-component-on-examine-detailed-message",
                     ("colorName", component.Fuel < component.FuelCapacity / 4f ? "darkorange" : "orange"),
                     ("fuelLeft", Math.Round(component.Fuel)),
                     ("fuelCapacity", component.FuelCapacity)));

Content.Shared/Chemistry/EntitySystems/SolutionContainerSystem.cs

@@ -69,7 +69,7 @@ namespace Content.Shared.Chemistry.EntitySystems
 
             if (solutionHolder.Contents.Count == 0)
             {
-                args.Message.AddText(Loc.GetString("shared-solution-container-component-on-examine-empty-container"));
+                args.PushText(Loc.GetString("shared-solution-container-component-on-examine-empty-container"));
                 return;
             }
 
@@ -86,7 +86,7 @@ namespace Content.Shared.Chemistry.EntitySystems
                 .ToHexNoAlpha(); //TODO: If the chem has a dark color, the examine text becomes black on a black background, which is unreadable.
             var messageString = "shared-solution-container-component-on-examine-main-text";
 
-            args.Message.AddMarkup(Loc.GetString(messageString,
+            args.PushMarkup(Loc.GetString(messageString,
                 ("color", colorHex),
                 ("wordedAmount", Loc.GetString(solutionHolder.Contents.Count == 1
                     ? "shared-solution-container-component-on-examine-worded-amount-one-reagent"

Content.Shared/Examine/ExamineSystemShared.cs

@@ -189,13 +189,15 @@ namespace Content.Shared.Examine
             message.PushColor(Color.DarkGray);
 
             // Raise the event and let things that subscribe to it change the message...
-            RaiseLocalEvent(entity.Uid, new ExaminedEvent(message, entity, examiner, IsInDetailsRange(examiner, entity)));
+            var isInDetailsRange = IsInDetailsRange(examiner, entity);
+            var examinedEvent = new ExaminedEvent(message, entity, examiner, isInDetailsRange, doNewline);
+            RaiseLocalEvent(entity.Uid, examinedEvent);
 
             //Add component statuses from components that report one
             foreach (var examineComponent in entity.GetAllComponents<IExamine>())
             {
                 var subMessage = new FormattedMessage();
-                examineComponent.Examine(subMessage, IsInDetailsRange(examiner, entity));
+                examineComponent.Examine(subMessage, isInDetailsRange);
                 if (subMessage.Tags.Count == 0)
                     continue;
 
@@ -214,15 +216,17 @@ namespace Content.Shared.Examine
 
     /// <summary>
     ///     Raised when an entity is examined.
-    ///     You have to manually add a newline at the start, and perform cleanup (popping state) at the end.
     /// </summary>
     public class ExaminedEvent : EntityEventArgs
     {
         /// <summary>
         ///     The message that will be displayed as the examine text.
-        ///     Use the methods it exposes to change it, and don't forget to add a newline at the start!
+        /// For most use cases, you probably want to use <see cref="PushMarkup"/> and similar instead to modify this,
-        ///     Input/Output parameter.
+        /// since it handles newlines and such correctly.
         /// </summary>
+        /// <seealso cref="PushMessage"/>
+        /// <seealso cref="PushMarkup"/>
+        /// <seealso cref="PushText"/>
         public FormattedMessage Message { get; }
 
         /// <summary>
@@ -240,12 +244,54 @@ namespace Content.Shared.Examine
         /// </summary>
         public bool IsInDetailsRange { get; }
 
-        public ExaminedEvent(FormattedMessage message, IEntity examined, IEntity examiner, bool isInDetailsRange)
+        private bool _doNewLine;
+
+        public ExaminedEvent(FormattedMessage message, IEntity examined, IEntity examiner, bool isInDetailsRange, bool doNewLine)
         {
             Message = message;
             Examined = examined;
             Examiner = examiner;
             IsInDetailsRange = isInDetailsRange;
+            _doNewLine = doNewLine;
+        }
+
+        /// <summary>
+        /// Push another message into this examine result, on its own line.
+        /// </summary>
+        /// <seealso cref="PushMarkup"/>
+        /// <seealso cref="PushText"/>
+        public void PushMessage(FormattedMessage message)
+        {
+            if (message.Tags.Count == 0)
+                return;
+
+            if (_doNewLine)
+                Message.AddText("\n");
+
+            Message.AddMessage(message);
+            _doNewLine = true;
+        }
+
+        /// <summary>
+        /// Push another message parsed from markup into this examine result, on its own line.
+        /// </summary>
+        /// <seealso cref="PushText"/>
+        /// <seealso cref="PushMessage"/>
+        public void PushMarkup(string markup)
+        {
+            PushMessage(FormattedMessage.FromMarkup(markup));
+        }
+
+        /// <summary>
+        /// Push another message containing raw text into this examine result, on its own line.
+        /// </summary>
+        /// <seealso cref="PushMarkup"/>
+        /// <seealso cref="PushMessage"/>
+        public void PushText(string text)
+        {
+            var msg = new FormattedMessage();
+            msg.AddText(text);
+            PushMessage(msg);
         }
     }
 }

Content.Shared/Stacks/SharedStackSystem.cs

@@ -100,8 +100,7 @@ namespace Content.Shared.Stacks
             if (!args.IsInDetailsRange)
                 return;
 
-            args.Message.AddText("\n");
+            args.PushMarkup(
-            args.Message.AddMarkup(
                 Loc.GetString("comp-stack-examine-detail-count",
                     ("count", component.Count),
                     ("markupCountColor", "lightgray")