Simplify conditions like x + 1 <= y to x < y

src/liballoc/collections/btree/node.rs

@@ -1191,7 +1191,7 @@ pub fn merge(
         let right_len = right_node.len();
 
         // necessary for correctness, but in a private module
-        assert!(left_len + right_len + 1 <= CAPACITY);
+        assert!(left_len + right_len < CAPACITY);
 
         unsafe {
             ptr::write(

src/librustc/mir/mod.rs

@@ -189,7 +189,7 @@ pub fn new(
     ) -> Self {
         // We need `arg_count` locals, and one for the return place.
         assert!(
-            local_decls.len() >= arg_count + 1,
+            local_decls.len() > arg_count,
             "expected at least {} locals, got {}",
             arg_count + 1,
             local_decls.len()