Remove trailing whitespace

PiperOrigin-RevId: 330992315
diff --git a/src/math/sigmoid-neonfma-rr2-p5-nr2recps.c b/src/math/sigmoid-neonfma-rr2-p5-nr2recps.c
index 4a38969..60f6a2d 100644
--- a/src/math/sigmoid-neonfma-rr2-p5-nr2recps.c
+++ b/src/math/sigmoid-neonfma-rr2-p5-nr2recps.c
@@ -38,7 +38,7 @@
 
     // General structure of the algorithm:
     //           / exp(x) / (1 + exp(x)) if x <= 0
-    //   f[x] := 
+    //   f[x] :=
     //           \ 1 - f[-x] if x >= 0
     //
     // First we compute f[-z] := exp(-z) / (1 + exp(-z)) where z = abs(x),