Auto merge of #32508 - Manishearth:rollup, r=Manishearth

Rollup of 6 pull requests

- Successful merges: #32383, #32387, #32440, #32470, #32478, #32492
- Failed merges:

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libstd/ascii.rs b/src/libstd/ascii.rs
index a8a3353da4c..3ae3cf8504e 100644
--- a/src/libstd/ascii.rs
+++ b/src/libstd/ascii.rs
@@ -567,4 +567,10 @@ mod tests {
                     &from_u32(lower).unwrap().to_string()));
         }
     }
+
+    #[test]
+    fn inference_works() {
+        let x = "a".to_string();
+        x.eq_ignore_ascii_case("A");
+    }
 }