Move internal module notice into long description

internal/fp.lua

@@ -1,4 +1,11 @@
---- Arithmetic on Curve25519's base field (unstable, for internal use only).
+--- Arithmetic on Curve25519's base field.
+--
+-- :::note Internal Module
+-- This module is meant for internal use within the library. Its API is unstable
+-- and subject to change without major version bumps.
+-- :::
+--
+-- <br />
 --
 -- @module[kind=internal] internal.fp
 --

internal/fq.lua

@@ -1,4 +1,11 @@
---- Arithmetic on Curve25519's scalar field (unstable, for internal use only).
+--- Arithmetic on Curve25519's scalar field.
+--
+-- :::note Internal Module
+-- This module is meant for internal use within the library. Its API is unstable
+-- and subject to change without major version bumps.
+-- :::
+--
+-- <br />
 --
 -- @module[kind=internal] internal.fq
 --

internal/sha512.lua

@@ -1,4 +1,11 @@
---- The SHA512 cryptographic hash function (unstable, for internal use only).
+--- The SHA512 cryptographic hash function.
+--
+-- :::note Internal Module
+-- This module is meant for internal use within the library. Its API is unstable
+-- and subject to change without major version bumps.
+-- :::
+--
+-- <br />
 --
 -- @module[kind=internal] internal.sha512
 --

web/styles.css

@@ -91,3 +91,7 @@ pre.highlight.highlight-lua {
     .titlebar { height: 20px; }
     .titlebar-close { font-size: 7px; }
 }
+
+.admonition-heading span {
+    display: none;
+}