Remove unwanted line numbers from the start each line often encountered from copying code blocks.
Load working-text, enter number's delimiter into "Numbers are delimited by" field and click "Remove line numbers and their delimiter" button.
If numbers do not have a delimiter, click the "Remove all numbers from start of line to first letter" button to remove line numbers (and punctuation marks if checked) from line start to first letter.
Enter number delimiter . and click "Remove line numbers and their delimiter" button to produce: