Fix a typo in `Axlsx::Worksheet#dimension` when a row was added without value.

When `Axlsx::Worksheet#add_row` is called without values `#dimension` returned
"AA:200" instead of "AA200", which resulted in a dimension of "A1:AA:200".
This lead to an error in `Axlsx.name_to_indices` which is then called with
"200" instead of "AA200" when using `Axlsx::Worksheet#abs_auto_filter`.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/axlsx/workbook/worksheet/worksheet.rb b/lib/axlsx/workbook/worksheet/worksheet.rb
index 6a53e2ca..1abfcd0d 100644
--- a/lib/axlsx/workbook/worksheet/worksheet.rb
+++ b/lib/axlsx/workbook/worksheet/worksheet.rb
@@ -275,7 +275,7 @@ module Axlsx
     # @return [String] the A1:B2 style reference for the first and last row column intersection in the workbook
     def dimension
       dim_start = rows.first.cells.first == nil ? 'A1' : rows.first.cells.first.r
-      dim_end = rows.last.cells.last == nil ? 'AA:200' : rows.last.cells.last.r
+      dim_end = rows.last.cells.last == nil ? 'AA200' : rows.last.cells.last.r
       "#{dim_start}:#{dim_end}"
     end