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doc: revise strict mode text in assert #28285

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doc: revise strict mode text in assert #28285

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14 changes: 7 additions & 7 deletions doc/api/assert.md
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The `assert` module provides a set of assertion functions for verifying
invariants. The module provides a recommended [`strict` mode][] and a more
lenient `legacy` mode.
lenient legacy mode.

For more information about the used equality comparisons see
[MDN's guide on equality comparisons and sameness][mdn-equality-guide].
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description: Added strict mode to the assert module.
-->

When using the `strict` mode, any `assert` function will use the equality used
in the strict function mode. So [`assert.deepEqual()`][] will, for example,
work the same as [`assert.deepStrictEqual()`][].
In `strict` mode, `assert` functions use the comparison in the corresponding
strict functions. For example, [`assert.deepEqual()`][] will behave like
[`assert.deepStrictEqual()`][].

On top of that, error messages which involve objects produce an error diff
instead of displaying both objects. That is not the case for the legacy mode.
In `strict` mode, error messages for objects display a diff. In legacy mode,
error messages for objects display the objects, often truncated.

It can be accessed using:
To use `strict` mode:

```js
const assert = require('assert').strict;
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