lo-commit-stat: Only search for bug ids in the summary

Sometimes, developers mention other bugs in the body as
related issues.
This might create mislead information in the release notes
E.g: https://wiki.documentfoundation.org/Releases/6.1.1/RC1
* Caolán is mentioned as fixer of i#66963 because the id is in
the body of 9c3d8b1c64
which fixes tdf#98558
* M. Stahl is mentioned as fixer of tdf#112447 because the id is
in the body of 31e66bd07c
This bug was fixed by Bjoern Michaelsen in
ce2fce9a41

Change-Id: I8d0ee038741dbb27364a56a7fa9285f32839c37b
Reviewed-on: https://gerrit.libreoffice.org/69750
Tested-by: Jenkins
Reviewed-by: Andras Timar <andras.timar@collabora.com>

bin/lo-commit-stat

@@ -189,11 +189,11 @@ sub load_git_log($$$$$$$)
             next;
         }
 
-        $line = search_bugs($pdata, $module, $commit_id, $line);
-        # FIXME: need to be implemented
-#        search_keywords($pdata, $line);
-
         unless (defined $pdata->{$module}{$commit_id}{'summary'}) {
+            $line = search_bugs($pdata, $module, $commit_id, $line);
+            # FIXME: need to be implemented
+            # search_keywords($pdata, $line);
+
             $summary = standardize_summary($line);
             $pdata->{$module}{$commit_id}{'summary'} = $summary;
         }
@@ -206,7 +206,7 @@ sub load_git_log($$$$$$$)
 sub get_repo_name($)
 {
     my $repo_dir = shift;
-    
+
     open (GIT_CONFIG, "$repo_dir/.git/config") ||
         die "can't open \"$$repo_dir/.git/config\" for reading: $!\n";