tdf#149115 Trim the white sapce in title before emptiness check

Title that only contains white space should be treated as empty.

Change-Id: I7e4ec6aed206e01dd62fb3afc278fa90d84b7598
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/138268
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <heiko.tietze@documentfoundation.org>
(cherry picked from commit af87ec3137c32ba098c072304595d8b590f3447c)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/138293
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
diff --git a/sw/source/core/access/AccessibilityCheck.cxx b/sw/source/core/access/AccessibilityCheck.cxx
index 1d4c0f5..50a37dc 100644
--- a/sw/source/core/access/AccessibilityCheck.cxx
+++ b/sw/source/core/access/AccessibilityCheck.cxx
@@ -836,7 +836,7 @@ public:
        const uno::Reference<document::XDocumentProperties> xDocumentProperties(
            xDPS->getDocumentProperties());
        OUString sTitle = xDocumentProperties->getTitle();
        if (sTitle.isEmpty())
        if (sTitle.trim().isEmpty())
        {
            lclAddIssue(m_rIssueCollection, SwResId(STR_DOCUMENT_TITLE),
                        sfx::AccessibilityIssueID::DOCUMENT_TITLE);