Fixed short names

jplag.frontend.csharp-6/src/main/java/de/jplag/csharp/Language.java

@@ -15,7 +15,7 @@ import de.jplag.TokenList;
 @MetaInfServices(de.jplag.Language.class)
 public class Language implements de.jplag.Language {
     private static final String NAME = "C# 6 Parser";
-    private static final String SHORT_NAME = "C# 6";
+    private static final String SHORT_NAME = "csharp";
     private static final String[] FILE_ENDINGS = new String[] {".cs", ".CS"};
     private static final int DEFAULT_MIN_TOKEN_MATCH = 8;
 

jplag.frontend.rlang/src/main/java/de/jplag/rlang/Language.java

@@ -14,7 +14,7 @@ import de.jplag.TokenList;
 public class Language implements de.jplag.Language {
 
     public static final String NAME = "R Parser";
-    public static final String SHORT_NAME = "R";
+    public static final String SHORT_NAME = "rlang";
     public static final int DEFAULT_MIN_TOKEN_MATCH = 8;
     private final RParserAdapter parserAdapter;
 

jplag/src/test/java/de/jplag/special/TokenPrinterTest.java

@@ -23,7 +23,7 @@ public class TokenPrinterTest extends TestBase {
     private static final String PRINTER_FOLDER = "PRINTER"; // in the folder 'jplag/src/test/resources/samples'
 
     private static final String LANGUAGE_CPP = "cpp";
-    private static final String LANGUAGE_R = "R";
+    private static final String LANGUAGE_R = "rlang";
 
     @Disabled
     @Test