Handle EOL when update VCS ignore file

platformio/commands/init.py

@@ -278,6 +278,8 @@ def init_cvs_ignore(project_dir):
     if isfile(ignore_path):
         with open(ignore_path) as fp:
             current = fp.readlines()
+        if current and not current[-1].endswith("\n"):
+            current[-1] += "\n"
     for d in default:
         if d not in current:
             current.append(d)