improving elk detection

src/main/scala/eu/nomad_lab/parsers/ElkParser.scala

@@ -22,9 +22,9 @@ object ElkParser extends SimpleExternalParserGenerator(
       )) :: Nil
   ),
   mainFileTypes = Seq("text/.*"),
-  mainFileRe = """\+-----------+\+
-\| Elk version (?<version>[0-9.a-zA-Z]+) started \|
-\+----------+\+""".r,
+  mainFileRe = """\s*\+-----------+\+\s*
+\s*\| Elk version (?<version>[0-9.a-zA-Z]+) started \|\s*
+\s*\+----------+\+\s*""".r,
   cmd = Seq(DefaultPythonInterpreter.pythonExe(), "${envDir}/parsers/elk/parser/parser-elk/parser_elk.py",
     "--uri", "${mainFileUri}", "${mainFilePath}"),
   resList = Seq(