Switch to rust stable.

Author: rbartlensky

.rustfmt.toml

@@ -1,5 +1,2 @@
-indent_style="Block"
-imports_indent="Block"
 use_try_shorthand=true
 use_field_init_shorthand=true
-merge_imports=true

.travis.yml

@@ -1,5 +1,4 @@
 language: rust
-rust: nightly
 before_script:
   - rustup component add rustfmt-preview
 script:

luacompiler/src/lib/bytecode/mod.rs

@@ -84,9 +84,9 @@ impl LuaBytecode {
 
 impl fmt::Display for LuaBytecode {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{{\n");
+        write!(f, "{{\n")?;
         for instr in &self.block {
-            write!(f, "  {}\n", instr);
+            write!(f, "  {}\n", instr)?;
         }
         write!(f, "}}")
     }

luacompiler/src/lib/irgen/register_map.rs

@@ -177,7 +177,7 @@ mod tests {
     #[test]
     fn registers_are_retrieved_in_the_correct_order() {
         let mut rm = RegisterMap::new();
-        for i in 0..3 {
+        for _ in 0..3 {
             rm.push_scope();
             rm.create_reg("foo");
         }

luavm/src/lib/lua_values/mod.rs

@@ -321,7 +321,7 @@ mod tests {
         let bar_get = main.get_attr("bar").unwrap();
         assert_eq!(bar_get.kind(), LuaValKind::INT);
         assert_eq!(bar_get.to_int().unwrap(), 2);
-        main.set_attr("bar", LuaVal::from(2.0));
+        main.set_attr("bar", LuaVal::from(2.0)).unwrap();
         let bar_get = main.get_attr("bar").unwrap();
         assert_eq!(bar_get.kind(), LuaValKind::FLOAT);
         assert_float_absolute_eq!(bar_get.to_float().unwrap(), 2.0, 0.1);
@@ -553,7 +553,8 @@ mod tests {
         table2
             .get_attr("foo")
             .unwrap()
-            .set_attr("foo", LuaVal::from(2));
+            .set_attr("foo", LuaVal::from(2))
+            .unwrap();
         assert_eq!(
             table3
                 .get_attr("foo")