Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

Author: jaydeluca

prometheus-metrics-core/pom.xml

@@ -54,7 +54,6 @@
     <dependency>
       <groupId>org.awaitility</groupId>
       <artifactId>awaitility</artifactId>
-      <version>4.3.0</version>
       <scope>test</scope>
     </dependency>
   </dependencies>

prometheus-metrics-core/src/test/java/io/prometheus/metrics/core/metrics/HistogramTest.java

@@ -1029,10 +1029,11 @@ public void markCurrentSpanAsExemplar() {}
     await()
         .atMost(2, SECONDS)
         .until(
-            () ->
-                getExemplar(histogram.collect(), Double.POSITIVE_INFINITY, "path", "/hello") != null
-                    && getExemplar(histogram.collect(), Double.POSITIVE_INFINITY, "path", "/world")
-                        != null);
+            () -> {
+              HistogramSnapshot s = histogram.collect();
+              return getExemplar(s, Double.POSITIVE_INFINITY, "path", "/hello") != null
+                  && getExemplar(s, Double.POSITIVE_INFINITY, "path", "/world") != null;
+            });
     snapshot = histogram.collect();
     assertExemplarEquals(ex1a, getExemplar(snapshot, 1.0, "path", "/hello"));
     assertExemplarEquals(ex1b, getExemplar(snapshot, 1.0, "path", "/world"));