Enhancement: adjust newline handling in tp_unfold_column_tool when unfolding the final column

[jennaj]

toolshed.g2.bx.psu.edu/repos/bgruening/text_processing/tp_unfold_column_tool/9.5+galaxy3

history https://usegalaxy.eu/u/jenj/h/help-tp-unfold-column-tool-unfold-columns-from-a-table

reported at https://help.galaxyproject.org/t/unfold-bug-missing-newline-char/17687

Issue

The tool appears to behave inconsistently when the split column is the final column. In a multiline example, expanded rows are concatenated rather than written as separate lines (missing newlines). In a single-row example where the final column is the split column, the tool appears to make no visible change. The shared history includes both passing and failing examples.

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Workaround for End-Users

1. use Add column to create a column in your file, use this tool, then remove those extra lines from your output (a filter tool -- easier if your add column was REMOVEME type of text to search on.
2. try a different tool such as Text reformatting with awk. Please see examples in linked Galaxy Help topic above.

[wm75]

Thanks a lot @jennaj for the detailed investigation!

I think you're wrong about the single-row sub-issue. In your dataset 32 in the example history, the coumn did not get unfolded because its values are space-separated, but you asked for spltting them on comma.

The other half of the issue, the missing newlines when unfolding the last column, is very real though.