update version number, correct printer

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "scryer-prolog"
-version = "0.8.78"
+version = "0.8.79"
 authors = ["Mark Thom <markjordanthom@gmail.com>"]
 repository = "https://github.com/mthom/scryer-prolog"
 description = "A modern Prolog implementation written mostly in Rust."

src/prolog/heap_print.rs

@@ -389,7 +389,7 @@ fn non_quoted_token<Iter: Iterator<Item=char>>(mut iter: Iter) -> bool {
         } else if c == '{' {
             (iter.next() == Some('}') && iter.next().is_none())
         } else if solo_char!(c) {
-            false // !iter.next().is_none()                
+            false
         } else {
             false
         }