support range selection in assist docs

1 files changed, 17 insertions, 0 deletions

diff --git a/docs/user/assists.md b/docs/user/assists.md
index 8e2e8cc94..182f07e98 100644
--- a/docs/user/assists.md
+++ b/docs/user/assists.md
@@ -245,3 +245,20 @@ fn main() {
     (1 + 2) * 4;
 }
 ```
+
+## `introduce_variable`
+
+Extracts subexpression into a variable.
+
+```rust
+// BEFORE
+fn main() {
+    <|>(1 + 2)<|> * 4;
+}
+
+// AFTER
+fn main() {
+    let var_name = (1 + 2);
+    var_name * 4;
+}
+```