TabFile: Fix Eclipse warnings and code style

- Redundant specification of type arguments
- Missing @Override annotation
- Incorrect indentation

Change-Id: Ifafc51bd0ef7f8fa8a3e7ad9cd6e42d70a913cbc

gerrit-server/src/main/java/com/google/gerrit/server/git/TabFile.java

@@ -32,12 +32,12 @@ public class TabFile {
   }
 
   public static Parser TRIM = new Parser() {
+    @Override
     public String parse(String str) {
        return str.trim();
     }
   };
 
-
   protected static class Row {
     public String left;
     public String right;
@@ -50,7 +50,7 @@ public class TabFile {
 
   protected static List<Row> parse(String text, String filename, Parser left,
       Parser right, ValidationError.Sink errors) throws IOException {
-    List<Row> rows = new ArrayList<Row>();
+    List<Row> rows = new ArrayList<>();
     BufferedReader br = new BufferedReader(new StringReader(text));
     String s;
     for (int lineNumber = 1; (s = br.readLine()) != null; lineNumber++) {