Fix missing preposition typos

[husamemadH]

Description

Restores a preposition dropped from seven sentences.

Motivation

Each is contradicted by a sibling page carrying the same sentence correctly:

• The three replaceItem() pages on SVGStringList, SVGLengthList and SVGNumberList say "The item that was added the list." The appendItem(), initialize() and insertItemBefore() pages in the same interfaces all say "added to the list" — nine correct against these three.
• Gyroscope() and RelativeOrientationSensor() say "The actual reading frequency depends device hardware". The five other sensor constructors, including GravitySensor(), Magnetometer() and Accelerometer(), all say "depends on".
• The fill property note says "It doesn't apply other SVG, HTML, or pseudo-elements." The same boilerplate reads "doesn't apply to other" twelve times elsewhere, for example on baseline-shift, and the preceding clause in this very sentence is "The fill property only applies to …".
• The XSLT <xsl:output> page says "must be the child <xsl:stylesheet>". Sibling XSLT element pages such as <xsl:attribute-set> say "must be the child of".

[github-actions]

Preview URLs (7 pages)

• /en-US/docs/Web/API/Gyroscope/Gyroscope
• /en-US/docs/Web/API/RelativeOrientationSensor/RelativeOrientationSensor
• /en-US/docs/Web/API/SVGLengthList/replaceItem
• /en-US/docs/Web/API/SVGNumberList/replaceItem
• /en-US/docs/Web/API/SVGStringList/replaceItem
• /en-US/docs/Web/CSS/Reference/Properties/fill
• /en-US/docs/Web/XML/XSLT/Reference/Element/output

Flaws (4)

Note! 6 documents with no flaws that don't need to be listed. 🎉

Found an unexpected or unresolvable flaw? Please report it here.

URL: /en-US/docs/Web/CSS/Reference/Properties/fill
Title: fill CSS property
Flaw count: 4

• macros:
  • Macro csssyntax produces link /en-US/docs/Web/CSS/Reference/Values/url which doesn't resolve
  • Macro csssyntax produces link /en-US/docs/Web/CSS/Reference/Values/number-token which doesn't resolve
  • Macro csssyntax produces link /en-US/docs/Web/CSS/Reference/Values/url which doesn't resolve
  • Macro csssyntax produces link /en-US/docs/Web/CSS/Reference/Values/hash-token which doesn't resolve

[estelle]

Thanks! 🎉