statement and 3.3 Import statements). 3. Command lines in a comment that may be cut-and-pasted into a shell. 4.5 Line-wrapping Terminology Note: When code that might otherwise legally occupy a single line

with the corresponding built-in operators. For example, use | as a bitwise- or logical-or, not as a shell-style pipe. Define operators only on your own types. More precisely, define them in the same headers