Simplify mdls command in README

README.md

@@ -63,7 +63,7 @@ Please note that Glance skips previews for large files to avoid slowing down you
 It's possible that your file's extension or [UTI](https://en.wikipedia.org/wiki/Uniform_Type_Identifier) isn't associated with Glance. You can easily verify this:
 
 1. Check whether the file extension is matched to the correct class in [`PreviewVCFactory.swift`](./QLPlugin/Views/PreviewVCFactory.swift).
-2. Find your file's UTI by running `mdls -name kMDItemContentType -name kMDItemContentTypeTree /path/to/your/file`. Check whether the UTI is listed under `QLSupportedContentTypes` in [`Info.plist`](./QLPlugin/Info.plist).
+2. Find your file's UTI by running `mdls -name kMDItemContentType /path/to/your/file`. Check whether the UTI is listed under `QLSupportedContentTypes` in [`Info.plist`](./QLPlugin/Info.plist).
 3. If an association is missing, please feel free to add it and submit a PR.
 
 ## Contributing
@@ -76,5 +76,5 @@ To add previews for a new file extension, please follow these steps:
 
 1. Create a new class for your file type in [this directory](./QLPlugin/Views/Previews/). It should implement the `Preview` protocol. See the other files in the directory for examples.
 2. Match the file extension to your class in [`PreviewVCFactory.swift`](./QLPlugin/Views/PreviewVCFactory.swift).
-3. Find your file's UTI by running `mdls -name kMDItemContentType -name kMDItemContentTypeTree /path/to/your/file`. Add it to `QLSupportedContentTypes` in [`Info.plist`](./QLPlugin/Info.plist).
+3. Find your file's UTI by running `mdls -name kMDItemContentType /path/to/your/file`. Add it to `QLSupportedContentTypes` in [`Info.plist`](./QLPlugin/Info.plist).
 4. Update [`README.md`](README.md), [`SupportedFilesWC.xib`](Glance/SupportedFilesWC.xib), the [App Store description](AppStore/Listing/Description.txt) and [`Credits.rtf`](Glance/Credits.rtf) (if you introduced a new library).