readme: move "how to run single lint" instructions to "Allowing/denying lints" section.

Author: matthiaskrgr

README.md

@@ -90,14 +90,6 @@ Note that this is still experimental and only supported on the nightly channel:
 cargo fix -Z unstable-options --clippy
 ```
 
-#### Running only a single lint
-
-If you care only about the warnings of a single lint and want to ignore everything else, you
-can first deny all the clippy lints and then explicitly enable the lint(s) you care about:
-````
-cargo clippy -- -Aclippy::all -Wclippy::useless_format
-````
-
 ### Running Clippy from the command line without installing it
 
 To have cargo compile your crate with Clippy without Clippy installation
@@ -183,6 +175,8 @@ If you do not want to include your lint levels in your code, you can globally en
 flags to Clippy during the run: `cargo clippy -- -A clippy::lint_name` will run Clippy with `lint_name` disabled and
 `cargo clippy -- -W clippy::lint_name` will run it with that enabled. This also works with lint groups. For example you
 can run Clippy with warnings for all lints enabled: `cargo clippy -- -W clippy::pedantic`
+If you care only about a single lint, you can allow all others and then explicitly reenable
+the lint(s) you are interested in: `cargo clippy -- -Aclippy::all -Wclippy::useless_format -Wclippy::...`
 
 ## Contributing