In "This macro is not needed for Qt, which use a internal method.", "use" should be "uses".
In the same section, under GLIB_SCHEMAS, "there default settings" should be "their default settings".
A commit references this bug: Author: bcr Date: Wed Sep 18 08:11:34 UTC 2019 New revision: 53419 URL: https://svnweb.freebsd.org/changeset/doc/53419 Log: Change "use" to "uses" and "a" to "an". PR: 240655 Submitted by: pauamma@gundo.com Changes: head/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
Fix committed, thank you! PR closed.