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-rw-r--r--src/tools/rust-analyzer/docs/book/src/configuration_generated.md4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/tools/rust-analyzer/docs/book/src/configuration_generated.md b/src/tools/rust-analyzer/docs/book/src/configuration_generated.md
index 1cbe51836f4..0a612d20b9c 100644
--- a/src/tools/rust-analyzer/docs/book/src/configuration_generated.md
+++ b/src/tools/rust-analyzer/docs/book/src/configuration_generated.md
@@ -102,6 +102,10 @@ Default:
 
  List of cfg options to enable with the given values.
 
+To enable a name without a value, use `"key"`.
+To enable a name with a value, use `"key=value"`.
+To disable, prefix the entry with a `!`.
+
 
  **rust-analyzer.cargo.extraArgs** (default: [])