Improve docstring of square

oschulz · devmotion · web-flow · commit 9014791e4f1f · 2021-11-08T02:00:42.000+01:00
Co-authored-by: David Widmann &lt;devmotion@users.noreply.github.com&gt;
diff --git a/src/functions.jl b/src/functions.jl
@@ -3,6 +3,6 @@
 """
     square(x)
 
-Inverse of `sqrt(x)`.
+Inverse of `sqrt(x)` for non-negative `x`.
 """
 square(x) = x^2
