editeng: don't let wild-card auto-correct leave current word

If a paragraph has e.g. multiple -> in it then auto-correct of the first
one will create via the .*->.* rule a new auto-correct entry that has as
long-word the word that contains the first -> until the last -> and
everything in between.  This will be somewhat irritating when it is
eventually applied.  Avoid it by limiting the wild-card loop to the
current word, which is apparently the intent anyway.

(regression from a074258922)

Change-Id: I294bae863c44eb460627b61b4383133131fe4b3a
Reviewed-on: https://gerrit.libreoffice.org/28608
Reviewed-by: László Németh <nemeth@numbertext.org>
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>

editeng/source/misc/svxacorr.cxx

@@ -2830,6 +2830,11 @@ const SvxAutocorrWord* SvxAutocorrWordList::WordMatches(const SvxAutocorrWord *p
                         nSttWdPos = rTxt.indexOf( sTmp, nFndPos);
                         if (nSttWdPos != -1)
                         {
+                            sal_Int32 nTmp(nFndPos);
+                            while (nTmp < nSttWdPos && !IsWordDelim(rTxt[nTmp]))
+                                nTmp++;
+                            if (nTmp < nSttWdPos)
+                                break; // word delimiter found
                             buf.append(rTxt.copy(nFndPos, nSttWdPos - nFndPos)).append(pFnd->GetLong());
                             nFndPos = nSttWdPos + sTmp.getLength();
                         }