Add support for suggesting as_ref to Result accesses

src/test/ui/suggestions/option-content-move.fixed

@@ -18,4 +18,22 @@ impl LipogramCorpora {
     }
 }
 
+pub struct LipogramCorpora2 {
+    selections: Vec<(char, Result<String, String>)>,
+}
+
+impl LipogramCorpora2 {
+    pub fn validate_all(&mut self) -> Result<(), char> {
+        for selection in &self.selections {
+            if selection.1.is_ok() {
+                if selection.1.as_ref().unwrap().contains(selection.0) {
+                //~^ ERROR cannot move out of borrowed content
+                    return Err(selection.0);
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
 fn main() {}

src/test/ui/suggestions/option-content-move.rs

@@ -18,4 +18,22 @@ impl LipogramCorpora {
     }
 }
 
+pub struct LipogramCorpora2 {
+    selections: Vec<(char, Result<String, String>)>,
+}
+
+impl LipogramCorpora2 {
+    pub fn validate_all(&mut self) -> Result<(), char> {
+        for selection in &self.selections {
+            if selection.1.is_ok() {
+                if selection.1.unwrap().contains(selection.0) {
+                //~^ ERROR cannot move out of borrowed content
+                    return Err(selection.0);
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
 fn main() {}

src/test/ui/suggestions/option-content-move.stderr

@@ -7,6 +7,15 @@ LL |                 if selection.1.unwrap().contains(selection.0) {
    |                    cannot move out of borrowed content
    |                    help: consider borrowing the `Option`'s content: `selection.1.as_ref()`
 
-error: aborting due to previous error
+error[E0507]: cannot move out of borrowed content
+  --> $DIR/option-content-move.rs:29:20
+   |
+LL |                 if selection.1.unwrap().contains(selection.0) {
+   |                    ^^^^^^^^^^^
+   |                    |
+   |                    cannot move out of borrowed content
+   |                    help: consider borrowing the `Result`'s content: `selection.1.as_ref()`
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0507`.