2.1.9 符号间的空白 Whitespace between tokens

Except at the beginning of a logical line or in string literals, the whitespace characters space, tab and formfeed can be used interchangeably to separate tokens. Whitespace is needed between two tokens only if their concatenation could otherwise be interpreted as a different token (e.g., ab is one token, but a b is two tokens).

除非位于逻辑行起首或者字符串当中，空格，制表符和换页符这些空白字符可以等同地用于分隔词法项(token)。空白仅当两个符号在连接时会有其它含义时才使用(例如, ab是一个符号, 但a b是两个符号).