doc: Note that param to prompt is optional

Signed-off-by: Keith Packard <keithp@keithp.com>
keith-packard · Dec 21, 2022 · a2c4716 · a2c4716
1 parent 771cc7e
commit a2c4716
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/doc/snek.adoc b/doc/snek.adoc
@@ -1887,9 +1887,9 @@ number.
 
 === `input(` _prompt_ `)`
 
-Prints _prompt_ and then waits for the user to enter some text,
-terminated with a newline. The text, without the trailing newline, is
-returned.
+Prints optional _prompt_ and then waits for the user to enter some
+text, terminated with a newline. The text, without the trailing
+newline, is returned.
 
 [subs="verbatim,quotes"]
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