CSV Cleaner — illustrative example

INPUT
SKU value is " 0012 "; trim surrounding spaces but preserve leading zeros.

RESULT
Cleaned SKU: 0012 stored as text, not the number 12.

REVIEW
CSV cleanup should follow explicit rules for whitespace, blanks and delimiters. Preserve values whose formatting carries meaning, such as leading-zero identifiers.

This is a teaching example, not a live execution record.