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Sam Tobin-Hochstadt 11ae3af9b3 add type for 2-arg `atan'
original commit: 9ab4887e580d17d756e70642168c8c2171b92df1
2010-05-04 19:47:37 -04:00
collects add type for 2-arg `atan' 2010-05-04 19:47:37 -04:00