Fix help string for configure. (Fix bug #18961)

f1363461 · Guillaume Melquiond · 26776eb9 · f1363461
Commit f1363461 authored May 19, 2015 by Guillaume Melquiond
--- a/configure.in
+++ b/configure.in
@@ -111,7 +111,7 @@ AC_ARG_ENABLE(doc,
    enable_doc=yes)

 AC_ARG_ENABLE(html-doc,
-    AS_HELP_STRING([--enable-html-doc], [do not build HTML documentation]),,
+    AS_HELP_STRING([--disable-html-doc], [do not build HTML documentation]),,
    enable_html_doc=yes)

 # Experimental Jessie3 Frama-C plugin, disabled by default