[gnumeric] Doc fix.

[Morten Welinder <mortenw src gnome org>]

commit 47b9c4aaef4aba3c076cfe77aaf315df6f72fd34
Author: Morten Welinder <terra gnome org>
Date:   Fri Mar 20 19:18:39 2015 -0400

    Doc fix.

 src/xml-sax-write.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/src/xml-sax-write.c b/src/xml-sax-write.c
index 9975ef4..5055b8f 100644
--- a/src/xml-sax-write.c
+++ b/src/xml-sax-write.c
@@ -202,12 +202,19 @@ xml_write_sheet_names (GnmOutputXML *state)
        for (i = 0 ; i < n ; i++) {
                sheet = workbook_sheet_by_index (state->wb, i);
                gsf_xml_out_start_element (state->output, GNM "SheetName");
+
+               /*
+                * Note, that we explicitly namespace these attributes.
+                * That is not wrong, per se, but note that Gnumeric until
+                * 1.12.22 will not read files without this explicit name-
+                * space and that the abbreviation must be "gnm".
+                */
                if (sheet->sheet_type == GNM_SHEET_OBJECT)
                        gsf_xml_out_add_cstr (state->output, GNM "SheetType", "object");
                gsf_xml_out_add_int (state->output, GNM "Cols",
-                                                        gnm_sheet_get_max_cols (sheet));
+                                    gnm_sheet_get_max_cols (sheet));
                gsf_xml_out_add_int (state->output, GNM "Rows",
-                                                        gnm_sheet_get_max_rows (sheet));
+                                    gnm_sheet_get_max_rows (sheet));
                gsf_xml_out_add_cstr (state->output, NULL, sheet->name_unquoted);
                gsf_xml_out_end_element (state->output); /* </gnm:SheetName> */
        }