rename fn write_valid_utf8() to write_valid_utf8_to_console()
rename fn write_valid_utf8() to write_valid_utf8_to_console()

aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust