Usermanual, fix up userfeatures example code in OpenType features section of shaping chapter.
diff --git a/docs/usermanual-opentype-features.xml b/docs/usermanual-opentype-features.xml
index 4405328..242ac8e 100644
--- a/docs/usermanual-opentype-features.xml
+++ b/docs/usermanual-opentype-features.xml
@@ -167,14 +167,21 @@
"discretionary" ligatures in the font:
</para>
<programlisting language="C">
- unsigned int num_features = 1;
- hb_feature_t userfeatures[num_features];
+ hb_feature_t userfeatures[1];
userfeatures[0].tag = HB_TAG('d','l','i','g');
userfeatures[0].value = 1;
- userfeatures[0].start = 0;
- userfeatures[0].end = (unsigned int) -1;
+ userfeatures[0].start = HB_FEATURE_GLOBAL_START;
+ userfeatures[0].end = HB_FEATURE_GLOBAL_END;
</programlisting>
<para>
+ <literal>HB_FEATURE_GLOBAL_END</literal> and
+ <literal>HB_FEATURE_GLOBAL_END</literal> are macros we can use
+ to indicate that the features will be applied to the entire
+ buffer. We could also have used a literal <literal>0</literal>
+ for the start and a <literal>-1</literal> to indicate the end of
+ the buffer (or have selected other start and end positions, if needed).
+ </para>
+ <para>
When we pass the <varname>userfeatures</varname> array to
<function>hb_shape()</function>, any discretionary ligature
substitutions from our font that match the text in our buffer
