fix doc rst underline

ksunden · ksunden · commit be53f0cb16ad · 2025-04-25T14:33:15.000-05:00
diff --git a/docs/source/index.rst b/docs/source/index.rst
@@ -4,7 +4,7 @@
    contain the root `toctree` directive.
 
 mpl_data_containers Documentation
-============================
+=================================
 
 This is prototype development for the next generation of data structures for
 Matplotlib.  This is the version "to throw away".  Everything in this
