save_output creates incomplete file names if source file name has more than one period

[ahmadh21]

If a source file has multiple periods in the filename, calling save_output drops all parts of the filename after the first period

To Reproduce
Process a file named sample.file.1.jpg. Call .save_output(path, output_format="csv"). Results in sample.csv being produced.

Expected behavior
Calling save_output in the outlined scenario should produce sample.file.1.csv.