Fix a typo

missing a terminator caused a document generation fail.
diff --git a/doc/fcrange.fncs b/doc/fcrange.fncs
index 4181b80..ba76f65 100644
--- a/doc/fcrange.fncs
+++ b/doc/fcrange.fncs
@@ -72,3 +72,4 @@
 @DESC@
 Returns in <parameter>begin</parameter> and <parameter>end</parameter> as the range.
 @SINCE@		2.11.91
+@@