chore: Remove trailing whitespace (#129)

Switch to the convention of using no trailing whitespace, even on blank lines. Also remove some unintended trailing whitespace on non-blank lines and fix a few typos.

Co-authored-by: Aaron Fenyes <aaron.fenyes@fareycircles.ooo>
Reviewed-on: #129
Reviewed-by: Vectornaut <vectornaut@nobody@nowhere.net>
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>

app-proto/examples/irisawa-hexlet.rs

@@ -15,9 +15,9 @@ fn main() {
         for k in 4..9 {
             println!("  {} sun", 1.0 / config[(3, k)]);
         }
-        
+
         // print the completed Gram matrix
         print::gram_matrix(&config);
     }
     print::loss_history(&realization.history);
-}
+}

app-proto/examples/kaleidocycle.rs

@@ -14,7 +14,7 @@ fn main() {
         // print the completed Gram matrix and the realized configuration
         print::gram_matrix(&config);
         print::config(&config);
-        
+
         // find the kaleidocycle's twist motion by projecting onto the tangent
         // space
         const N_POINTS: usize = 12;
@@ -29,4 +29,4 @@ fn main() {
         let normalization = 5.0 / twist_motion[(2, 0)];
         println!("\nTwist motion:{}", (normalization * twist_motion).to_string().trim_end());
     }
-}
+}