:a
-a
<a
>a
foo
foo_bar
bar_
1.2
2E10
2e5
3E-9
3.4E5
5.6e-7
1.
2.e2
.123
.123e2
0000.123
(* comment *)
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"Text Literal"
"Hello, World!\n"
"Escape characters: \n\f\t\r\"\000\001\002"