Merge pull request #622 from oliviercailloux/patch-1

Typo

Author: ndw

src/guide/xml/ch00.xml

@@ -88,7 +88,7 @@ of the XSLT 3.0 Recommendation.</para>
     that’s not true of a lot of stylesheets. There might be software
     engineering benefit in making a package even for stylesheets that
     you don’t intend to distribute, but that’s more likely to appeal to
-    people who think of what they’re doing is programming.
+    people who think of what they’re doing as programming.
   </para>
   <para>Nevertheless, there are lots of good reasons to use XSLT 3.0 even if
     you are “only” transforming documents and even if you don’t think of