Seq: Does not output when FIRST and LAST are the same number

[GrayJack]

Describe the bug The seq utils outputs nothing when the FIST operand is the same as the LAST operand

To Reproduce Steps to reproduce the behavior:

1. Run command with FIRST and LAST operands as the same number
2. Nothing will be displayed

Expected behavior Output only one number, the same one as FIRST and LAST operands

Screenshots

Desktop (please complete the following information):

• OS: Linux 5.9
• Rust Version: 1.48
• Software Version: Latest dev branch

Additional context None