Clean code

Typos, deprecated code usages, ...

src/types/from_sql.rs

@@ -240,7 +240,7 @@ mod test {
 
         fn check_ranges<T>(db: &Connection, out_of_range: &[i64], in_range: &[i64])
         where
-            T: Into<i64> + FromSql + ::std::fmt::Debug,
+            T: Into<i64> + FromSql + std::fmt::Debug,
         {
             for n in out_of_range {
                 let err = db

src/types/mod.rs

@@ -140,7 +140,6 @@ impl fmt::Display for Type {
 mod test {
     use super::Value;
     use crate::{params, Connection, Error, Result, Statement};
-    use std::f64::EPSILON;
     use std::os::raw::{c_double, c_int};
 
     fn checked_memory_handle() -> Result<Connection> {
@@ -264,7 +263,7 @@ mod test {
         assert_eq!(vec![1, 2], row.get::<_, Vec<u8>>(0)?);
         assert_eq!("text", row.get::<_, String>(1)?);
         assert_eq!(1, row.get::<_, c_int>(2)?);
-        assert!((1.5 - row.get::<_, c_double>(3)?).abs() < EPSILON);
+        assert!((1.5 - row.get::<_, c_double>(3)?).abs() < f64::EPSILON);
         assert_eq!(row.get::<_, Option<c_int>>(4)?, None);
         assert_eq!(row.get::<_, Option<c_double>>(4)?, None);
         assert_eq!(row.get::<_, Option<String>>(4)?, None);
@@ -355,7 +354,7 @@ mod test {
         assert_eq!(Value::Text(String::from("text")), row.get::<_, Value>(1)?);
         assert_eq!(Value::Integer(1), row.get::<_, Value>(2)?);
         match row.get::<_, Value>(3)? {
-            Value::Real(val) => assert!((1.5 - val).abs() < EPSILON),
+            Value::Real(val) => assert!((1.5 - val).abs() < f64::EPSILON),
             x => panic!("Invalid Value {:?}", x),
         }
         assert_eq!(Value::Null, row.get::<_, Value>(4)?);

src/types/to_sql.rs

@@ -363,7 +363,6 @@ mod test {
     #[test]
     fn test_i128() -> crate::Result<()> {
         use crate::Connection;
-        use std::i128;
         let db = Connection::open_in_memory()?;
         db.execute_batch("CREATE TABLE foo (i128 BLOB, desc TEXT)")?;
         db.execute(