Update colophon/imprint boilerplate to new standards

src/epub/text/colophon.xhtml

@@ -22,7 +22,7 @@
 			<b epub:type="z3998:personal-name">Stewart <abbr epub:type="z3998:given-name">A.</abbr> Levin</b><br/>
 			for<br/>
 			<a href="https://www.gutenberg.org/ebooks/173">Project Gutenberg</a><br/>
-			and on digital scans available at the<br/>
+			and on digital scans from the<br/>
 			<a href="https://catalog.hathitrust.org/Record/012192994">HathiTrust Digital Library</a>.</p>
 			<p>The cover page is adapted from<br/>
 			<i epub:type="se:name.visual-art.painting">The General Mas Sou in the History Piece <i epub:type="se:name.publication.play">The Retreat of Kiai-Ting</i></i>,<br/>

src/epub/text/imprint.xhtml

@@ -12,7 +12,7 @@
 				<img alt="The Standard Ebooks logo." src="../images/logo.svg" epub:type="z3998:publisher-logo se:image.color-depth.black-on-transparent"/>
 			</header>
 			<p>This ebook is the product of many hours of hard work by volunteers for <a href="https://standardebooks.org">Standard Ebooks</a>, and builds on the hard work of other literature lovers made possible by the public domain.</p>
-			<p>This particular ebook is based on a transcription produced for <a href="https://www.gutenberg.org/ebooks/173">Project Gutenberg</a> and on digital scans available at the <a href="https://catalog.hathitrust.org/Record/012192994">HathiTrust Digital Library</a>.</p>
+			<p>This particular ebook is based on a transcription from <a href="https://www.gutenberg.org/ebooks/173">Project Gutenberg</a> and on digital scans from the <a href="https://catalog.hathitrust.org/Record/012192994">HathiTrust Digital Library</a>.</p>
 			<p>The source text and artwork in this ebook are believed to be in the United States public domain; that is, they are believed to be free of copyright restrictions in the United States. They may still be copyrighted in other countries, so users located outside of the United States must check their local laws before using this ebook. The creators of, and contributors to, this ebook dedicate their contributions to the worldwide public domain via the terms in the <a href="https://creativecommons.org/publicdomain/zero/1.0/">CC0 1.0 Universal Public Domain Dedication</a>. For full license information, see the <a href="uncopyright.xhtml">Uncopyright</a> at the end of this ebook.</p>
 			<p>Standard Ebooks is a volunteer-driven project that produces ebook editions of public domain literature using modern typography, technology, and editorial standards, and distributes them free of cost. You can download this and other ebooks carefully produced for true book lovers at <a href="https://standardebooks.org">standardebooks.org</a>.</p>
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