allow non-strict mode for reading replaygain tags, to fallback to track tags if album tags are not available and vice versa
diff --git a/doc/html/documentation.html b/doc/html/documentation.html
index 384e6a7..6b807d4 100644
--- a/doc/html/documentation.html
+++ b/doc/html/documentation.html
@@ -457,7 +457,7 @@
</li>
<li>
<span class="argument">a|t</span><br />
- Specify '<span class="argument">a</span>' to use the album gain, or '<span class="argument">t</span>' to use the track gain
+ Specify '<span class="argument">a</span>' to use the album gain, or '<span class="argument">t</span>' to use the track gain. If tags for the preferred kind (album/track) do not exist but tags for the other (track/album) do, those will be used instead.
</li>
<li>
<span class="argument">l|L</span><br />