path-buf-push-overwrite: make lint adhere to lint message convention

Author: matthiaskrgr

clippy_lints/src/path_buf_push_overwrite.rs

@@ -60,7 +60,7 @@ impl<'tcx> LateLintPass<'tcx> for PathBufPushOverwrite {
                     cx,
                     PATH_BUF_PUSH_OVERWRITE,
                     lit.span,
-                    "Calling `push` with '/' or '\\' (file system root) will overwrite the previous path definition",
+                    "calling `push` with '/' or '\\' (file system root) will overwrite the previous path definition",
                     "try",
                     format!("\"{}\"", pushed_path_lit.trim_start_matches(|c| c == '/' || c == '\\')),
                     Applicability::MachineApplicable,

tests/ui/path_buf_push_overwrite.stderr

@@ -1,4 +1,4 @@
-error: Calling `push` with '/' or '/' (file system root) will overwrite the previous path definition
+error: calling `push` with '/' or '/' (file system root) will overwrite the previous path definition
   --> $DIR/path_buf_push_overwrite.rs:7:12
    |
 LL |     x.push("/bar");