Add :pin and :unpin. Closes issue #344.

common/locale/en-US/messages.properties

@@ -26,7 +26,8 @@ bookmark.removed-1 = Removed bookmark: %S
 bookmark.added-1 = Added bookmark: %S
 bookmark.deleted-1 = %S bookmark(s) deleted
 
-buffer.fewer-2 = %S fewer tab%S
+buffer.fewerTab-1 = %S fewer tab
+buffer.fewerTabs-1 = %S fewer tabs
 buffer.cantDetatchLast = Can't detach the last tab
 buffer.noMatching-1 = No matching buffer for %S
 buffer.multipleMatching-1 = More than one match for %S

common/locale/en-US/tabs.xml

@@ -381,6 +381,32 @@
     </description>
 </item>
 
+<h2 tag="app-tabs application-tabs pinned-tabs">Application Tabs</h2>
+
+<item>
+    <tags>pin pintab</tags>
+    <spec><oa>count</oa>pin<oa>tab</oa><oa>!</oa> <oa>arg</oa></spec>
+    <description>
+        <p>
+            Pin tab as an application tab. If <oa>!</oa> is given,
+            the tab's pinned state is toggled. Arguments and count
+            are the same as for <ex>:bdelete</ex> and <ex>:buffer</ex>.
+        </p>
+    </description>
+</item>
+
+<item>
+    <tags>unpin unpintab</tags>
+    <spec><oa>count</oa>pin<oa>tab</oa> <oa>arg</oa></spec>
+    <description>
+        <p>
+            Unpin tab as an application tab. Arguments and count
+            are the same as for <ex>:pintab</ex>.
+        </p>
+    </description>
+</item>
+
+
 </document>
 
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