Rollup merge of #56419 - mark-i-m:remove-try, r=Centril

Remove some uses of try!

src/libsyntax/parse/parser.rs

@@ -3145,7 +3145,7 @@ impl<'a> Parser<'a> {
                     RangeLimits::Closed
                 };
 
-                let r = try!(self.mk_range(Some(lhs), rhs, limits));
+                let r = self.mk_range(Some(lhs), rhs, limits)?;
                 lhs = self.mk_expr(lhs_span.to(rhs_span), r, ThinVec::new());
                 break
             }
@@ -3353,9 +3353,7 @@ impl<'a> Parser<'a> {
             RangeLimits::Closed
         };
 
-        let r = try!(self.mk_range(None,
-                                   opt_end,
-                                   limits));
+        let r = self.mk_range(None, opt_end, limits)?;
         Ok(self.mk_expr(lo.to(hi), r, attrs))
     }