Deleted rows/columns show up as blank

```
What steps will reproduce the problem?
1.enter some data in a spreadsheet
2.delete a blank row/column on one side of the data
3.load it using the php class

What is the expected output?
blank rows/columns are not shown.

What do you see instead?
blank rows show up with a single space.

Please provide any additional information below.

```

Original issue reported on code.google.com by `theballd...@gmail.com` on 11 Feb 2011 at 3:30

Start at the PHP class that loads the spreadsheet and trace how deleted trailing rows or columns become a single-space value. Reproduce the listed steps, then verify that blank rows and columns on either side of populated data are omitted rather than rendered with a space.

Written by the indexing model from the issue text.