[subset] add hb-subset api to documentation generator.
Standardize subset_input parameter to be input.
diff --git a/docs/harfbuzz-docs.xml b/docs/harfbuzz-docs.xml
index db04c2f..4c9bcaa 100644
--- a/docs/harfbuzz-docs.xml
+++ b/docs/harfbuzz-docs.xml
@@ -49,7 +49,7 @@
<ulink role="online-location" url="http://[SERVER]/libharfbuzz/index.html">http://[SERVER]/libharfbuzz/</ulink>.-->
</releaseinfo>
</partinfo>
-
+
<title>Reference manual</title>
<chapter id="core-api">
<title>Core API</title>
@@ -97,6 +97,12 @@
<xi:include href="xml/hb-directwrite.xml"/>
</chapter>
+ <chapter id="subset-api">
+ <title>Subset API</title>
+ <xi:include href="xml/hb-subset.xml"/>
+ </chapter>
+
+
<!--chapter id="object-tree">
<title>Object Hierarchy</title>
<xi:include href="xml/tree_index.sgml"/>
