Doc: Fix typo in linguist manual

Task-number: QTBUG-51975
Change-Id: Ie7069db3e35a81ea1f44d1bf4c0a2ffd6f3215aa
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

src/linguist/linguist/doc/src/linguist-manual.qdoc

@@ -1063,8 +1063,8 @@
         are optional in the plain-text system. However, with the text-ID-based
         system, this extra information becomes essential because without it you only
         have the text ID and the translator might not be able to make a sensible
-        translation from without any other context. You can use long descriptive
-        text ID and no comments but comments are often easier to understand.
+        translation from that without further context. You can use long descriptive
+        text IDs and no comments, but comments are often easier to understand.
 
     \endlist