follow-up fixes after 16416

include/mbgl/style/source.hpp

@@ -82,8 +82,9 @@ public:
     optional<uint8_t> getPrefetchZoomDelta() const noexcept;
 
     // If the given source supports loading tiles from a server,
-    // sets the minimum tile update interval, which is used to
-    // throttle the tile update network requests.
+    // sets the minimum tile update interval.
+    // Update network requests that are more frequent than the
+    // minimum tile update interval are suppressed.
     //
     // Default value is `Duration::zero()`.
     void setMinimumTileUpdateInterval(Duration) noexcept;

test/storage/online_file_source.test.cpp

@@ -229,7 +229,6 @@ TEST(OnlineFileSource, TEST_REQUIRES_SERVER(RespectMinimumUpdateInterval)) {
     std::unique_ptr<AsyncRequest> req = fs->request(resource, [&](Response) {
         auto wait = util::now() - start;
         EXPECT_GE(wait, resource.minimumUpdateInterval);
-        EXPECT_LT(wait, resource.minimumUpdateInterval + Milliseconds(10));
         loop.stop();
     });