Small consistency improvements suggested by AI

Author: stIncMale

driver-core/src/main/com/mongodb/ConnectionString.java

@@ -1474,7 +1474,7 @@ public WriteConcern getWriteConcern() {
      * getRetryWrites() method, which returned a primitive {@code boolean} value, and didn't allow callers to differentiate
      * between a false value and an unset value.
      *
-     * @return the retryWrites value, or null if unset
+     * @return the {@code retryWrites} value, or {@code null} if unset
      * @see #getMaxAdaptiveRetries()
      * @since 3.9
      * @mongodb.server.release 3.6
@@ -1488,7 +1488,7 @@ public Boolean getRetryWritesValue() {
      * Gets whether attempts to execute read commands should be retried if they fail due to a retryable error.
      * See {@link MongoClientSettings.Builder#retryReads(boolean)} for more information.
      *
-     * @return the retryReads value
+     * @return the {@code retryReads} value, or {@code null} if unset
      * @see #getMaxAdaptiveRetries()
      * @since 3.11
      * @mongodb.server.release 3.6
@@ -1502,7 +1502,7 @@ public Boolean getRetryReads() {
      * Gets the maximum number of retry attempts when encountering a retryable overload error.
      * See {@link MongoClientSettings.Builder#maxAdaptiveRetries(Integer)} for more information.
      *
-     * @return The {@code maxAdaptiveRetries} value.
+     * @return The {@code maxAdaptiveRetries} value, or {@code null} if unset.
      * @since 5.7
      */
     @Beta(Reason.CLIENT)

driver-core/src/main/com/mongodb/MongoClientSettings.java

@@ -945,7 +945,7 @@ public ReadConcern getReadConcern() {
     }
 
     /**
-     * The codec registry to use, or null if not set.
+     * The codec registry to use.
      *
      * @return the codec registry
      */