runcon/hashsum: remove references to get_matches_from_safe

src/uu/hashsum/src/hashsum.rs

@@ -290,7 +290,7 @@ pub fn uumain(mut args: impl uucore::Args) -> UResult<()> {
 
     let app = uu_app(&binary_name);
 
-    // FIXME: this should use get_matches_from_safe() and crash!(), but at the moment that just
+    // FIXME: this should use try_get_matches_from() and crash!(), but at the moment that just
     //        causes "error: " to be printed twice (once from crash!() and once from clap).  With
     //        the current setup, the name of the utility is not printed, but I think this is at
     //        least somewhat better from a user's perspective.

src/uu/runcon/src/runcon.rs

@@ -210,7 +210,7 @@ struct Options {
 }
 
 fn parse_command_line(config: App, args: impl uucore::Args) -> Result<Options> {
-    let matches = config.get_matches_from_safe(args)?;
+    let matches = config.try_get_matches_from(args)?;
 
     let compute_transition_context = matches.is_present(options::COMPUTE);