minor formatting (#4774)

Add one empty line so code displays properly  at eips.ethereum.org

EIPS/eip-3779.md

@@ -173,6 +173,7 @@ For simplicity's sake we assume that _jumpdest analysis_ has been done and that
 * `remove_items(pc)`returns the new `sp` after items are removed from the `data_stack` by the instruction at `pc`.
 * `add_items(pc)`returns the new SP after items are added to the `data_stack` by the instruction at `pc`.
 ```
+
 var code          [code_len]byte
 var avail_items   [code_len]int
 var return_stack  [1024]int = { -1 }
@@ -316,7 +317,7 @@ func validate(pc := 0, sp := 0, bp := 0, rp := 0) int, error {
          
          // both sides valid, check stack and return used_items
          used_items += max(left_used, right_used)
-         if (sp += used_items > `1023`) {
+         if (sp += used_items > 1023) {
             return pc, stack_overflow
          }
          return used_items, nil