diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index a85014fc16..092f2c1763 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -6807,8 +6807,7 @@
                 <link linkend='build-directory'>Build Directory</link>:
                 <literallayout class='monospaced'>
      ARCHIVER_MODE ?= "original"
-     ARCHIVER_CLASS = "${@'archive-${ARCHIVER_MODE}-source' if
-     ARCHIVER_MODE != 'none' else ''}"
+     ARCHIVER_CLASS = "${@'archive-${ARCHIVER_MODE}-source' if ARCHIVER_MODE != 'none' else ''}"
      INHERIT += "${ARCHIVER_CLASS}"
      SOURCE_ARCHIVE_PACKAGE_TYPE = "tar"
                 </literallayout>