Edit the bc help a bit
diff --git a/gen/bc_help.txt b/gen/bc_help.txt
index 648ed25..2e3fcb1 100644
--- a/gen/bc_help.txt
+++ b/gen/bc_help.txt
@@ -58,6 +58,8 @@
3) This bc has many more extensions than the GNU bc does. For details, see the
man page.
+This bc also implements the dot (.) extension of the BSD bc.
+
Options:
-e expr --expression=expr
@@ -94,6 +96,9 @@
e(expr) = raises e to the power of expr
j(n, x) = Bessel function of integer order n of x
+ This bc may load more functions with these options. See the manpage for
+ details.
+
-P --no-prompt
Disable the prompt in interactive mode.