Merge pull request #1331 from 102errors/master

spelling

@@ -158,7 +158,7 @@
         if ((!image || options & SDWebImageRefreshCached) && (![self.delegate respondsToSelector:@selector(imageManager:shouldDownloadImageForURL:)] || [self.delegate imageManager:self shouldDownloadImageForURL:url])) {
             if (image && options & SDWebImageRefreshCached) {
                 dispatch_main_sync_safe(^{
-                    // If image was found in the cache bug SDWebImageRefreshCached is provided, notify about the cached image
+                    // If image was found in the cache but SDWebImageRefreshCached is provided, notify about the cached image
                     // AND try to re-download it in order to let a chance to NSURLCache to refresh it from server.
                     completedBlock(image, nil, cacheType, YES, url);
                 });