fix: trim message

Author: ahmedAlaaInstabug

packages/instabug_flutter/lib/src/utils/user_steps/user_step_details.dart

@@ -78,7 +78,7 @@ class UserStepDetails {
 
     if (key != null) baseMessage += " with key '$key' ";
 
-    return baseMessage.trim();
+    return baseMessage.trimRight();
   }
 
   String? _getWidgetSpecificDetails() {

packages/instabug_flutter/test/utils/user_steps/user_step_details_test.dart

@@ -61,7 +61,7 @@ void main() {
 
       expect(
         details.message,
-        " Container  with key 'testKey' ",
+        " Container  with key 'testKey'",
       );
     });
 
@@ -113,7 +113,7 @@ void main() {
 
       expect(
         details.message,
-        " Container  with key 'testKey' ",
+        " Container  with key 'testKey'",
       );
     });