diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index d22c2a70a1..653f3da438 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -253,7 +253,7 @@
                     configuration.
                     In other words, do not copy an entire recipe into your
                     layer and then modify it.
-                    Rather, use <filename>.bbappend</filename> files to override the
+                    Rather, use <filename>.bbappend</filename> files to override
                     only those parts of the original recipe you need to modify.
                 </para>
             </section>
@@ -1509,7 +1509,7 @@
                 You might also need these variables:
                 <itemizedlist>
                     <listitem><para><filename><ulink url='&YOCTO_DOCS_REF_URL;#var-SERIAL_CONSOLES'>SERIAL_CONSOLES</ulink></filename>
-                        (e.g. "115200 ttyS0")</para></listitem>
+                        (e.g. "115200;ttyS0 115200;ttyS1")</para></listitem>
                     <listitem><para><filename><ulink url='&YOCTO_DOCS_REF_URL;#var-KERNEL_IMAGETYPE'>KERNEL_IMAGETYPE</ulink></filename>
                         (e.g. "zImage")</para></listitem>
                     <listitem><para><filename><ulink url='&YOCTO_DOCS_REF_URL;#var-IMAGE_FSTYPES'>IMAGE_FSTYPES</ulink></filename>
@@ -1549,7 +1549,7 @@
                 <filename>make oldconfig</filename>.
                 By making use of <filename>inherit kernel</filename> and potentially some of the
                 <filename>linux-*.inc</filename> files, most other functionality is
-                centralized and the the defaults of the class normally work well.
+                centralized and the defaults of the class normally work well.
             </para>
 
             <para>