Calc functions breaking change page

[pamelalozano16]

Fix #797.

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[ntkme]

We should also update the following code example defining a pow() function to something else on https://sass-lang.com/documentation/at-rules/function/

sass-site/source/documentation/at-rules/function.md

Lines 20 to 45 in 495d514

	{% codeExample 'functions' %}
	@function pow($base, $exponent) {
	$result: 1;
	@for $_ from 1 through $exponent {
	$result: $result * $base;
	}
	@return $result;
	}
	.sidebar {
	float: left;
	margin-left: pow(4, 3) * 1px;
	}
	===
	@function pow($base, $exponent)
	$result: 1
	@for $_ from 1 through $exponent
	$result: $result * $base
	@return $result
	.sidebar
	float: left
	margin-left: pow(4, 3) * 1px
	{% endcodeExample %}