Merge pull request #581 from nickolay/clippy_preference-docs

Clarify how clippy_preference works

Author: Xanewok

package.json

@@ -335,7 +335,7 @@
                         "off"
                     ],
                     "default": "opt-in",
-                    "description": "Controls eagerness of clippy diagnostics when available. Valid values are (case-insensitive):\n - \"off\": Disable clippy lints.\n - \"opt-in\": Clippy lints are shown when crates specify `#![warn(clippy)]`.\n - \"on\": Clippy lints enabled for all crates in workspace.\nYou need to install clippy via rustup if you haven't already.",
+                    "description": "Controls eagerness of clippy diagnostics when available. Valid values are (case-insensitive):\n - \"off\": Disable clippy lints.\n - \"on\": Display the same diagnostics as command-line clippy invoked with no arguments (`clippy::all` unless overridden).\n - \"opt-in\": Only display the lints explicitly enabled in the code. Start by adding `#![warn(clippy::all)]` to the root of each crate you want linted.\nYou need to install clippy via rustup if you haven't already.",
                     "scope": "resource"
                 },
                 "rust.jobs": {