compiler theory - Is there any language where names can include space characters? -

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is there programming language allows names include white spaces ? (by names, intend variables, methods, field, etc.)

scala allow whitespace characters in identifier names (but possible, need surround identifiers pair of backticks).

example (executed @ scala repl):

welcome scala version 2.8.0.final (java hotspot(tm) client vm, java 1.6.0_22). type in expressions have them evaluated. type :help more information.  scala> val `lol! works! :-d` = 4 lol! works! :-d: int = 4  scala> val `omg!!!` = 4 omg!!!: int = 4  scala> `omg!!!` + `lol! works! :-d` res0: int = 8

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