add preview of changes in readme

README.md

@@ -2,7 +2,12 @@
 The [Hind Siliguri](https://fonts.google.com/specimen/Hind+Siliguri) typeface contains malformed glyphs for Bengali Digit One "১" in its regular, medium, and semi-bold weights.
 I've fixed these for my personal use and decided to share here until original sources and distributions are updated.
 
+| original glyphs                           | fixed glyphs                        |
+|:-----------------------------------------:|:-----------------------------------:|
+| ![original glyphs](./.doc/original.png) | ![fixed glyphs](./.doc/fixed.png) |
+
 #### Note on sources
 
-original source is here: https://github.com/itfoundry/hind-siliguri
-But the build instructions in ITF's repo seems outdated, so I've edited their published TTF files in fontforge, creating the SFD and TTF files available in this repository.
+Original source is here: https://github.com/itfoundry/hind-siliguri.
+
+The build instructions in ITF's repo seem outdated, so I've edited their published TTF files in fontforge, creating the SFD and TTF files available in this repository.