Auto merge of #53599 - matthiaskrgr:split_str__to__split_char, r=frewsxcv

use char pattern for single-character splits: a.split("x") -> a.split('x')

1 files changed, 1 insertions, 1 deletions

diff --git a/src/librustc_incremental/assert_module_sources.rs b/src/librustc_incremental/assert_module_sources.rs
index 9b8e2c450d5..139159c1639 100644
--- a/src/librustc_incremental/assert_module_sources.rs
+++ b/src/librustc_incremental/assert_module_sources.rs
@@ -89,7 +89,7 @@ impl<'a, 'tcx> AssertModuleSource<'a, 'tcx> {
             (&user_path[..], None)
         };
 
-        let mut cgu_path_components = user_path.split("-").collect::<Vec<_>>();
+        let mut cgu_path_components = user_path.split('-').collect::<Vec<_>>();
 
         // Remove the crate name
         assert_eq!(cgu_path_components.remove(0), crate_name);