fix: fix typo

datafusion/functions/src/math/gcd.rs

@@ -35,7 +35,7 @@ use datafusion_macros::user_doc;
 
 #[user_doc(
     doc_section(label = "Math Functions"),
-    description = "Returns the greatest common divisor of `expression_x` and `expression_y`. Returns 0 if both inputs are zero..",
+    description = "Returns the greatest common divisor of `expression_x` and `expression_y`. Returns 0 if both inputs are zero.",
     syntax_example = "gcd(expression_x, expression_y)",
     standard_argument(name = "expression_x", prefix = "First numeric"),
     standard_argument(name = "expression_y", prefix = "Second numeric")