Grouping instructions in blocks
A block is a group of instructions that belong together. Indentation shows which instructions belong to a decision, loop, or function.
Compound statements end their header with : and place a non-empty body on
later indented lines:
if ready:
say "Go!"
Inline bodies are invalid:
if ready: say "Go!" # invalid
A comment does not count as a statement, so a comment-only block is invalid.
Pliro has no pass statement.