Remove schnorrsig from test names

Recently we moved from using the identifier 'schnorrsig' to 'schnorr',
we omitted to update the tests.

While we are at it use more idiomatic Rust unit test names (i.e., do not
start test name with `test_` because it stutters when the name is read
in output of `cargo test`).

src/schnorr.rs

@@ -304,8 +304,8 @@ mod tests {
 
     #[test]
     #[cfg(all(feature = "std", feature = "rand-std"))]
-    fn test_schnorrsig_sign_with_aux_rand_verify() {
-        test_schnorrsig_sign_helper(|secp, msg, seckey, rng| {
+    fn schnorr_sign_with_aux_rand_verify() {
+        sign_helper(|secp, msg, seckey, rng| {
             let mut aux_rand = [0u8; 32];
             rng.fill_bytes(&mut aux_rand);
             secp.sign_schnorr_with_aux_rand(msg, seckey, &aux_rand)
@@ -314,30 +314,30 @@ mod tests {
 
     #[test]
     #[cfg(all(feature = "std", feature = "rand-std"))]
-    fn test_schnorrsig_sign_with_rng_verify() {
-        test_schnorrsig_sign_helper(|secp, msg, seckey, mut rng| {
+    fn schnor_sign_with_rng_verify() {
+        sign_helper(|secp, msg, seckey, mut rng| {
             secp.sign_schnorr_with_rng(msg, seckey, &mut rng)
         })
     }
 
     #[test]
     #[cfg(all(feature = "std", feature = "rand-std"))]
-    fn test_schnorrsig_sign_verify() {
-        test_schnorrsig_sign_helper(|secp, msg, seckey, _| {
+    fn schnorr_sign_verify() {
+        sign_helper(|secp, msg, seckey, _| {
             secp.sign_schnorr(msg, seckey)
         })
     }
 
     #[test]
     #[cfg(all(feature = "std", feature = "rand-std"))]
-    fn test_schnorrsig_sign_no_aux_rand_verify() {
-        test_schnorrsig_sign_helper(|secp, msg, seckey, _| {
+    fn schnorr_sign_no_aux_rand_verify() {
+        sign_helper(|secp, msg, seckey, _| {
             secp.sign_schnorr_no_aux_rand(msg, seckey)
         })
     }
 
     #[cfg(all(feature = "std", feature = "rand-std"))]
-    fn test_schnorrsig_sign_helper(
+    fn sign_helper(
         sign: fn(&Secp256k1<All>, &Message, &KeyPair, &mut ThreadRng) -> Signature,
     ) {
         let secp = Secp256k1::new();
@@ -361,7 +361,7 @@ mod tests {
     #[test]
     #[cfg(any(feature = "alloc", feature = "std"))]
     #[cfg(not(fuzzing))]  // fixed sig vectors can't work with fuzz-sigs
-    fn test_schnorrsig_sign() {
+    fn schnorr_sign() {
         let secp = Secp256k1::new();
 
         let hex_msg = hex_32!("E48441762FB75010B2AA31A512B62B4148AA3FB08EB0765D76B252559064A614");
@@ -384,7 +384,7 @@ mod tests {
     #[test]
     #[cfg(not(fuzzing))]  // fixed sig vectors can't work with fuzz-sigs
     #[cfg(any(feature = "alloc", feature = "std"))]
-    fn test_schnorrsig_verify() {
+    fn schnorr_verify() {
         let secp = Secp256k1::new();
 
         let hex_msg = hex_32!("E48441762FB75010B2AA31A512B62B4148AA3FB08EB0765D76B252559064A614");