Fixes some minor lint errors/warnings.

core/java/com/google/census/CensusContext.java

@@ -49,7 +49,7 @@ public interface CensusContext {
   /** Sets the current thread-local {@link CensusContext}. */
   void setCurrent();
 
-  /** Builder for {@link Context}. */
+  /** Builder for {@link CensusContext}. */
   interface Builder {
     /**
      * Associates the given tag key with the given tag value.

core/java/com/google/census/MetricMap.java

@@ -52,7 +52,7 @@ public static Builder builder() {
   }
 
   /**
-   * Returns the number of metrics in this {@link MetricsMap}.
+   * Returns the number of metrics in this {@link MetricMap}.
    */
   public int size() {
     return metrics.size();

core/java/com/google/census/TagValue.java

@@ -19,7 +19,7 @@
  * TagValue's are {@link String}s with enforced restrictions.
  */
 public final class TagValue {
-  public static final int MAX_LENGTH = Tag.MAX_LENGTH;;
+  public static final int MAX_LENGTH = Tag.MAX_LENGTH;
 
   public TagValue(String value) {
     this.value = Tag.sanitize(value);

core/javatests/com/google/census/MetricMapTest.java

@@ -62,7 +62,7 @@ public void testBuilderEmpty() {
 
   @Test
   public void testBuilder() {
-    ArrayList<Metric> expected = new ArrayList(10);
+    ArrayList<Metric> expected = new ArrayList<>(10);
     MetricMap.Builder builder = MetricMap.builder();
     for (int i = 1; i <= 10; i++) {
       expected.add(new Metric(new MetricName("m" + i), i * 11.1));

core_native/java/com/google/census/CensusSerializer.java

@@ -21,7 +21,7 @@
 
 import javax.annotation.Nullable;
 
-/** Native implementation {@link CenusContext} serialization. */
+/** Native implementation {@link CensusContext} serialization. */
 final class CensusSerializer {
   private static final char TAG_PREFIX = '\2';
   private static final char TAG_DELIM = '\3';