Trim test files + remove duplicate newlines

Author: tamasvajk

csharp/ql/test/experimental/Security Features/Serialization/test0.cs

@@ -1,5 +1,3 @@
-
-
 using System;
 using System.Data;
 using System.IO;

csharp/ql/test/experimental/Security Features/campaign/Solorigate/test.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Text;
 
-
 class FalsePositiveCases
 {
 	// regular FVN

csharp/ql/test/experimental/ir/ir/array.cs

@@ -20,4 +20,3 @@ public void twod_and_init_acc()
          e[1, 1] = -1;
     }
 }
-

csharp/ql/test/experimental/ir/ir/stmts.cs

@@ -42,7 +42,6 @@ public static int switchStmt()
         return 0;
     }
 
-
     public static void tryCatchFinally() 
     {
         int x = 5;

csharp/ql/test/experimental/ir/ir/using.cs

@@ -26,5 +26,3 @@ static void Main()
         o3.DoSomething();
     }
 }
-
-

csharp/ql/test/library-tests/aliases/Program.cs

@@ -1,6 +1,4 @@
 /*
-
-
   Class is defined in three places, and requires the alias to disambiguate them.
 */
 

csharp/ql/test/library-tests/assemblies/Assemblies.cs

@@ -14,5 +14,3 @@ static void Main(string[] args)
         Locations.Test l = new Locations.Test();
     }
 }
-
-

csharp/ql/test/library-tests/assemblies/AssemblyInfo.cs

@@ -1,5 +1,3 @@
-
-
 using System.Reflection;
 
 [assembly: AssemblyVersion("1.0.0.0")]

csharp/ql/test/library-tests/assignables/Assignables.cs

@@ -138,5 +138,3 @@ void UsingDeclarations()
         using var x = new System.IO.MemoryStream();
     }
 }
-
-

csharp/ql/test/library-tests/async/async.cs

@@ -54,5 +54,3 @@ private static async Task<StreamReader> OpenAsync(string filename)
         }
     }
 }
-
-