Address code review comments.

Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>

Author: brian-brazil

simpleclient/src/main/java/io/prometheus/client/Counter.java

@@ -64,6 +64,12 @@
  * </pre>
  * These can be aggregated and processed together much more easily in the Prometheus
  * server than individual metrics for each labelset.
+ *
+ * If there is a suffix of <code>_total</code> on the metric name, it will be
+ * removed. When exposing the time series for counter value, a
+ * <code>_total</code> suffix will be added. This is for compatibility between
+ * OpenMetrics and the Prometheus text format, as OpenMetrics requires the
+ * <code>_total</code> suffix.
  */
 public class Counter extends SimpleCollector<Counter.Child> implements Collector.Describable {
 

simpleclient/src/main/java/io/prometheus/client/SimpleCollector.java

@@ -216,7 +216,7 @@ public B namespace(String namespace) {
       return (B)this;
     }
     /**
-     * Set the uit of the metric. Required.
+     * Set the unit of the metric. Required.
      */
     public B unit(String unit) {
       this.unit = unit;

simpleclient_caffeine/src/test/java/io/prometheus/client/cache/caffeine/CacheMetricsCollectorTest.java

@@ -70,7 +70,6 @@ public void loadingCacheExposesMetricsForLoadsAndExceptions() throws Exception {
         }
         cache.get("user3");
 
-
         assertMetric(registry, "caffeine_cache_hit_total", "loadingusers", 1.0);
         assertMetric(registry, "caffeine_cache_miss_total", "loadingusers", 3.0);