chore: update function descriptions

Author: aayush0325

lib/node_modules/@stdlib/math/base/special/lucasf/test/test.js

@@ -44,24 +44,24 @@ tape( 'if provided a negative number, the function returns `NaN`', function test
 	var v;
 	var i;
 
-	t.strictEqual( isnanf( lucasf( -3.14 ) ), true, 'returns NaN' );
+	t.strictEqual( isnanf( lucasf( -3.14 ) ), true, 'returns expected value' );
 
 	for ( i = -1; i > -100; i-- ) {
 		v = lucasf( i );
-		t.strictEqual( isnanf( v ), true, 'returns NaN when provided ' + i );
+		t.strictEqual( isnanf( v ), true, 'returns expected value when provided ' + i );
 	}
 	t.end();
 });
 
 tape( 'if provided positive infinity, the function returns `NaN`', function test( t ) {
 	var v = lucasf( PINF );
-	t.strictEqual( isnanf( v ), true, 'returns NaN when provided +infinity' );
+	t.strictEqual( isnanf( v ), true, 'returns expected value when provided +infinity' );
 	t.end();
 });
 
 tape( 'if provided `NaN`, the function returns `NaN`', function test( t ) {
 	var v = lucasf( NaN );
-	t.strictEqual( isnanf( v ), true, 'returns NaN when provided a NaN' );
+	t.strictEqual( isnanf( v ), true, 'returns expected value when provided a NaN' );
 	t.end();
 });
 
@@ -86,7 +86,7 @@ tape( 'if provided nonnegative integers greater than `34`, the function returns
 	var v;
 	for ( i = 35; i < 500; i++ ) {
 		v = lucasf( i );
-		t.strictEqual( isnanf( v ), true, 'returns NaN when provided ' + i );
+		t.strictEqual( isnanf( v ), true, 'returns expected value when provided ' + i );
 	}
 	t.end();
 });

lib/node_modules/@stdlib/math/base/special/lucasf/test/test.native.js

@@ -53,7 +53,7 @@ tape( 'if provided a negative number, the function returns `NaN`', opts, functio
 
 	for ( i = -1; i > -100; i-- ) {
 		v = lucasf( i );
-		t.strictEqual( isnanf( v ), true, 'returns NaN when provided ' + i );
+		t.strictEqual( isnanf( v ), true, 'returns expected value when provided ' + i );
 	}
 	t.end();
 });
@@ -73,7 +73,7 @@ tape( 'if provided nonnegative integers less than `34`, the function returns `Na
 	var v;
 	for ( i = 35; i < 500; i++ ) {
 		v = lucasf( i );
-		t.strictEqual( isnanf( v ), true, 'returns NaN when provided ' + i );
+		t.strictEqual( isnanf( v ), true, 'returns expected value when provided ' + i );
 	}
 	t.end();
 });