clang-format plugin: Add missing NL (new line) at EOF (end of file)

clang-format.exe removes trailing new lines at end of file.

However, if no NL is found at EOF one should be added.

Patch by Teodor MICU!

Differential Revision: https://reviews.llvm.org/D37732

llvm-svn: 314033

Author: zmodem

clang/tools/clang-format-vs/ClangFormat/ClangFormatPackage.cs

@@ -326,7 +326,13 @@ private void FormatView(IWpfTextView view, OptionPageGrid options)
 
             string filePath = Vsix.GetDocumentPath(view);
             var path = Path.GetDirectoryName(filePath);
+
             string text = view.TextBuffer.CurrentSnapshot.GetText();
+            if (!text.EndsWith(Environment.NewLine))
+            {
+                view.TextBuffer.Insert(view.TextBuffer.CurrentSnapshot.Length, Environment.NewLine);
+                text += Environment.NewLine;
+            }
 
             RunClangFormatAndApplyReplacements(text, 0, text.Length, path, filePath, options, view);
         }