unnecessary parentheses around function argument

[wcbeard]

Extra parens at alga/alga/src/linear/transformation.rs:371:14 keep the library from compiling. Some((b.norm() / a.norm())) -> Some(b.norm() / a.norm()) fixes it.

Error message

cargo build
   Compiling alga v0.5.2 (file:///Users/wbeard/repos/proto/hello_alg/alga/alga)
warning: unused macro definition
   --> alga/alga/src/macros.rs:143:1
    |
143 | / macro_rules! impl_approx_eq {
144 | |     ($V:expr; $($T:ty),* $(,)*) => {
145 | |         $(impl ApproxEq for $T {
146 | |             type Eps = $T;
...   |
158 | |     }
159 | | }
    | |_^
    |
    = note: #[warn(unused_macros)] on by default
warning: unused macro definition

--> alga/alga/src/general/one_operator.rs:84:1

|

84 | / macro_rules! impl_quasigroup(

85 | |     (<$M:ty> for $($T:tt)+) => {

86 | |         impl_marker!($crate::general::AbstractQuasigroup<$M>; $($T)+);

87 | |     }

88 | | );

| |__^
warning: unused macro definition

--> alga/alga/src/general/one_operator.rs:184:1

|

184 | / macro_rules! impl_loop(

185 | |     (<$M:ty> for $($T:tt)+) => {

186 | |         impl_quasigroup!(<$M> for $($T)+);

187 | |         impl_marker!($crate::general::AbstractLoop<$M>; $($T)+);

188 | |     }

189 | | );

| |__^
error: unnecessary parentheses around function argument

--> alga/alga/src/linear/transformation.rs:371:14

|

371 |         Some((b.norm() / a.norm()))

|              ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses

|

note: lint level defined here

--> alga/alga/src/lib.rs:18:9

|

18  | #![deny(unused_parens)]

|         ^^^^^^^^^^^^^
error: aborting due to previous error
error: Could not compile alga.
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