tdf#107035 Fix field character style DOCX import

Reinstate a call to DontExpandFormat which was removed from
appendTextContent in commit 232ad2f2

This ensures that direct character formatting which ended immediately
before the insertion point will not be expanded to cover the inserted
content.

Reviewed-on: https://gerrit.libreoffice.org/50729Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
(cherry picked from commit 18cbb8fe)

Change-Id: Ie5fa6b5c5acee4f885f9e67535e98801af23661a

sw/source/core/unocore/unotext.cxx

@@ -527,6 +527,10 @@ throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception)
         aIllegal.Message = "first parameter invalid";
         throw aIllegal;
     }
+    // Any direct formatting ending at the insert position (xRange) should not
+    // be expanded to cover the inserted content (xContent)
+    GetDoc()->DontExpandFormat( *aPam.Start() );
+
     // first test if the range is at the right position, then call
     // xContent->attach
     const SwStartNode* pOwnStartNode = GetStartNode();