test: update test messages

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
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    status: na
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    status: na
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    status: na
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    status: na
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    status: na
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    status: na
  - task: lint_javascript_tests
    status: passed
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    status: na
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    status: na
  - task: lint_c_src
    status: na
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    status: na
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    status: na
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    status: na
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  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/dstructs/named-typed-tuple/test/test.copy_within.js

@@ -41,12 +41,12 @@ tape( 'a tuple has a `copyWithin` method for copying a sequence of tuple element
 	Point = namedtypedtuple( [ 'x', 'y' ] );
 	p = new Point();
 
-	t.strictEqual( hasProp( p, 'copyWithin' ), true, 'has property' );
-	t.strictEqual( isFunction( p.copyWithin ), true, 'has method' );
+	t.strictEqual( hasProp( p, 'copyWithin' ), true, 'returns expected value' );
+	t.strictEqual( isFunction( p.copyWithin ), true, 'returns expected value' );
 	t.end();
 });
 
-tape( 'the method throws an error if invoked with a `this` context which is not a typed array instance', function test( t ) {
+tape( 'the method throws an error if invoked with a `this` context which is not a tuple instance', function test( t ) {
 	var values;
 	var Point;
 	var p;
@@ -78,7 +78,7 @@ tape( 'the method throws an error if invoked with a `this` context which is not
 	}
 });
 
-tape( 'the method throws an error if invoked with a `this` context which is not a typed array instance (end)', function test( t ) {
+tape( 'the method throws an error if invoked with a `this` context which is not a tuple instance (end)', function test( t ) {
 	var values;
 	var Point;
 	var p;