Clippies for rust 1.59. (#179)

* Clippies for rust 1.59.

* Fmt fix

src/driver/tester.rs

@@ -200,7 +200,7 @@ pub struct InProcessTester {}
 
 /// TODO: eu escaping
 fn quote<T: AsRef<str>>(text: T) -> String {
-    format!("\"{}\"", text.as_ref().replace("\"", "\\\""))
+    format!("\"{}\"", text.as_ref().replace('\"', "\\\""))
 }
 
 /// Convert stats to a core expression for output
@@ -253,13 +253,13 @@ impl InProcessTester {
             let stdout = Input::new(
                 Locator::Literal(result.stdout.clone()),
                 Some(format!("{}-{}-stdout-text", &target_name, &format)),
-                "text".to_string(),
+                "text",
             );
             // Literal stderr
             let stderr = Input::new(
                 Locator::Literal(result.stderr),
                 Some(format!("{}-{}-stderr-text", &target_name, &format)),
-                "text".to_string(),
+                "text",
             );
 
             let mut expectations: Vec<String> = result
@@ -310,11 +310,7 @@ impl InProcessTester {
         writeln!(&mut evidence_script, "}}\n")?;
 
         let evidence_script_text = std::str::from_utf8(&evidence_script).unwrap().to_string();
-        let evidence_input = Input::new(
-            Locator::Literal(evidence_script_text),
-            None,
-            "eu".to_string(),
-        );
+        let evidence_input = Input::new(Locator::Literal(evidence_script_text), None, "eu");
         inputs.push(evidence_input);
 
         let evidence_file = plan.evidence_file_name();

src/eval/stg/time.rs

@@ -181,7 +181,7 @@ impl StgIntrinsic for ZdtFields {
         let hour = dt.hour();
         let min = dt.minute();
         let sec = (dt.second() as f64) + (dt.timestamp_subsec_millis() as f64) / 1000f64;
-        let tz = dt.offset().to_string().replace(":", "");
+        let tz = dt.offset().to_string().replace(':', "");
 
         let mut fields = IndexMap::new();
         fields.insert(

src/import/edn.rs

@@ -97,10 +97,7 @@ fn value_to_core(edn: &Value, file_id: usize) -> Result<RcExpr, SourceError> {
         )), // NB. no core primitive for datetime right now
         Value::Uuid(uuid) => Ok(acore::meta(
             acore::str(uuid.to_string()),
-            acore::block(iter::once((
-                "tag".to_string(),
-                acore::str("uuid".to_string()),
-            ))),
+            acore::block(iter::once(("tag".to_string(), acore::str("uuid")))),
         )),
         Value::TaggedElement(t, e) => Ok(acore::meta(
             value_to_core(e, file_id)?,

src/syntax/export/pretty.rs

@@ -32,7 +32,7 @@ pub trait ToSourceDoc {
 }
 
 fn escape_string_literal(s: &str) -> String {
-    s.replace("{", "{{").replace("}", "}}")
+    s.replace('{', "{{").replace('}', "}}")
 }
 
 impl ToSourceDoc for Literal {