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-rw-r--r--docs/examples/tutorial/external/libc_sin.pyx1
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/examples/tutorial/external/libc_sin.pyx b/docs/examples/tutorial/external/libc_sin.pyx
index fb247c03d..2de8444d6 100644
--- a/docs/examples/tutorial/external/libc_sin.pyx
+++ b/docs/examples/tutorial/external/libc_sin.pyx
@@ -1,4 +1,5 @@
from libc.math cimport sin
+
cdef double f(double x):
return sin(x * x)