version bump, README.md tweak

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "scryer-prolog"
-version = "0.8.116"
+version = "0.8.117"
 authors = ["Mark Thom <markjordanthom@gmail.com>"]
 build = "build.rs"
 repository = "https://github.com/mthom/scryer-prolog"

README.md

@@ -50,7 +50,7 @@ Extend Scryer Prolog to include the following, among other features:
       (backtrackable).
 - [x] Delimited continuations based on reset/3, shift/1 (documented in
       "Delimited Continuations for Prolog").
-- [x] Add opt-in tabling library based on delimited continuations
+- [x] Tabling library based on delimited continuations
       (documented in "Tabling as a Library with Delimited Control").      
 - [ ] A _redone_ representation of strings as difference list of
       chars, using a packed internal representation (_in progress_).      

src/prolog/heap_print.rs

@@ -147,7 +147,7 @@ fn char_to_string(c: char) -> String {
         '\u{0c}' => "\\f".to_string(), // UTF-8 form feed
         '\u{08}' => "\\b".to_string(), // UTF-8 backspace
         '\u{07}' => "\\a".to_string(), // UTF-8 alert
-        '\x20'..='\x7e' => c.to_string(),
+        '\x20' ..= '\x7e' => c.to_string(),
         _ => format!("\\x{:x}\\", c as u32),
     }
 }