Use fully qualified path in macro

It is easier to maintain code if macros use the fully qualified path to
types and functions instead of relying on code that uses the macro to
import said type or function.

hashes/src/hash160.rs

@@ -24,7 +24,7 @@ use core::str;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, hex, ripemd160, sha256};
+use crate::{Error, ripemd160, sha256};
 
 crate::internal_macros::hash_type! {
     160,

hashes/src/internal_macros.rs

@@ -87,9 +87,9 @@ macro_rules! hash_trait_impls {
         }
 
         impl<$($gen: $gent),*> str::FromStr for Hash<$($gen),*> {
-            type Err = hex::Error;
+            type Err = $crate::hex::Error;
             fn from_str(s: &str) -> Result<Self, Self::Err> {
-                hex::FromHex::from_hex(s)
+                $crate::hex::FromHex::from_hex(s)
             }
         }
 

hashes/src/ripemd160.rs

@@ -25,7 +25,7 @@ use core::convert::TryInto;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, HashEngine as _, hex};
+use crate::{Error, HashEngine as _};
 
 crate::internal_macros::hash_type! {
     160,

hashes/src/sha1.rs

@@ -20,7 +20,7 @@ use core::convert::TryInto;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, HashEngine as _, hex};
+use crate::{Error, HashEngine as _};
 
 crate::internal_macros::hash_type! {
     160,

hashes/src/sha256d.rs

@@ -19,7 +19,7 @@ use core::str;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, hex, sha256};
+use crate::{Error, sha256};
 
 crate::internal_macros::hash_type! {
     256,

hashes/src/sha256t.rs

@@ -20,7 +20,7 @@ use core::marker::PhantomData;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, hex, sha256};
+use crate::{Error, sha256};
 
 type HashEngine = sha256::HashEngine;
 

hashes/src/sha512.rs

@@ -25,7 +25,7 @@ use core::convert::TryInto;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, HashEngine as _, hex};
+use crate::{Error, HashEngine as _};
 
 crate::internal_macros::hash_trait_impls!(512, false);
 

hashes/src/sha512_256.rs

@@ -28,7 +28,7 @@ use core::str;
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{hex, sha512, sha512::BLOCK_SIZE, Error};
+use crate::{sha512, sha512::BLOCK_SIZE, Error};
 
 /// Engine to compute SHA512/256 hash function.
 ///

hashes/src/siphash24.rs

@@ -24,7 +24,7 @@ use core::{cmp, mem, ptr, str};
 use core::ops::Index;
 use core::slice::SliceIndex;
 
-use crate::{Error, Hash as _, HashEngine as _, hex};
+use crate::{Error, Hash as _, HashEngine as _};
 
 crate::internal_macros::hash_type! {
     64,