d20efdc4c5
- And fix fallback parentheses
Example
---
```rust
fn foo() {
let foo = Some("foo");
return foo.and$0(Some("bar"));
}
```
**Before this PR**
```rust
fn foo() {
let foo = Some("foo");
return foo.and_then(|| Some("bar"));
}
```
**After this PR**
```rust
fn foo() {
let foo = Some("foo");
return foo.and_then(|it| Some("bar"));
}
```
---
```rust
struct Func { f: fn() -> i32 }
fn foo() {
let foo = true;
let func = Func { f: || 2 };
let x = foo.then$0(func.f);
}
```
**Before this PR**
```text
request handler panicked: Failed to make ast node `syntax::ast::generated::nodes::CallExpr` from text const C: () = func.f();
```
**After this PR**
```rust
struct Func { f: fn() -> i32 }
fn foo() {
let foo = true;
let func = Func { f: || 2 };
let x = foo.then_some((func.f)());
}
```
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