Add handling of Assembly attributes that do not end on a new line

- Added tests that fail if we don't have a newline after Assembly attributes
- Updated FileHelper to support commented out Assembly attributes that do not end with a new line

Author: KiLLeRRaT

src/GitVersionTask.Tests/InvalidFileCheckerTests.cs

@@ -98,6 +98,21 @@ public void VerifyCommentWorksCSharp([Values("AssemblyVersion", "AssemblyFileVer
             FileHelper.CheckForInvalidFiles(new ITaskItem[] { new MockTaskItem { ItemSpec = "AssemblyInfo.cs" } }, projectFile);
         }
 
+        [Test]
+        public void VerifyCommentWithNoNewLineAtEndWorksCSharp([Values("AssemblyVersion", "AssemblyFileVersion", "AssemblyInformationalVersion")]string attribute)
+        {
+            using (var writer = File.CreateText(Path.Combine(projectDirectory, "AssemblyInfo.cs")))
+            {
+                writer.Write(@"
+using System;
+using System.Reflection;
+
+//[assembly: {0}(""1.0.0.0"")]", attribute);
+            }
+
+            FileHelper.CheckForInvalidFiles(new ITaskItem[] { new MockTaskItem { ItemSpec = "AssemblyInfo.cs" } }, projectFile);
+        }
+
         [Test]
         public void VerifyStringWorksCSharp([Values("AssemblyVersion", "AssemblyFileVersion", "AssemblyInformationalVersion")]string attribute)
         {
@@ -186,6 +201,21 @@ Imports System.Reflection
             FileHelper.CheckForInvalidFiles(new ITaskItem[] { new MockTaskItem { ItemSpec = "AssemblyInfo.vb" } }, projectFile);
         }
 
+        [Test]
+        public void VerifyCommentWithNoNewLineAtEndWorksVisualBasic([Values("AssemblyVersion", "AssemblyFileVersion", "AssemblyInformationalVersion")]string attribute)
+        {
+            using (var writer = File.CreateText(Path.Combine(projectDirectory, "AssemblyInfo.vb")))
+            {
+                writer.Write(@"
+Imports System
+Imports System.Reflection
+
+'<Assembly: {0}(""1.0.0.0"")>", attribute);
+            }
+
+            FileHelper.CheckForInvalidFiles(new ITaskItem[] { new MockTaskItem { ItemSpec = "AssemblyInfo.vb" } }, projectFile);
+        }
+
         [Test]
         public void VerifyStringWorksVisualBasic([Values("AssemblyVersion", "AssemblyFileVersion", "AssemblyInformationalVersion")]string attribute)
         {

src/GitVersionTask/FileHelper.cs

@@ -97,6 +97,8 @@ private static bool CSharpFileContainsVersionAttribute(string compileFile, strin
             var combine = Path.Combine(Path.GetDirectoryName(projectFile), compileFile);
             var allText = File.ReadAllText(combine);
 
+            allText += System.Environment.NewLine; // Always add a new line, this handles the case for when a file ends with the EOF marker and no new line. If you don't have this newline, the regex will match commented out Assembly*Version tags on the last line.
+
             var blockComments = @"/\*(.*?)\*/";
             var lineComments = @"//(.*?)\r?\n";
             var strings = @"""((\\[^\n]|[^""\n])*)""";
@@ -123,6 +125,8 @@ private static bool VisualBasicFileContainsVersionAttribute(string compileFile,
             var combine = Path.Combine(Path.GetDirectoryName(projectFile), compileFile);
             var allText = File.ReadAllText(combine);
 
+            allText += System.Environment.NewLine; // Always add a new line, this handles the case for when a file ends with the EOF marker and no new line. If you don't have this newline, the regex will match commented out Assembly*Version tags on the last line.
+
             var lineComments = @"'(.*?)\r?\n";
             var strings = @"""((\\[^\n]|[^""\n])*)""";