GREP_OUTPUT_MODE_DESCRIPTION = "Shape of the returned text. 'files_with_matches' (
default): newline-separated matching file paths. 'content': matching lines grouped by file under a '<path>:' header, each line indented and formatted '<line_number>: <line text>' (only the matched line,
no surrounding context
). 'count': one '<path>: <match_count>' line per file."