README.md in unibits-2.4.0 vs README.md in unibits-2.5.0

@@ -3,23 +3,24 @@
 Ruby library and CLI command that visualizes various Unicode and ASCII/single byte encodings in the terminal:
 
 - Makes analyzing encodings easier
 - Helps you with debugging strings
 - Highlights invalid/special/blank bytes/characters/codepoints
-- Supports *UTF-8*, *UTF-16LE*/*UTF-16BE*, *UTF-32LE*/*UTF-32BE*, *ISO-8859-X*, *Windows-125X*, *IBMX*, *CP85X*, *macX*, *TIS-620*/*Windows-874*, *KOI8-R*/*KOI8-U*, 7-Bit *ASCII*, and arbitrary *BINARY* data
+- Supports *UTF-8*, *UTF-16LE*/*UTF-16BE*, *UTF-32LE*/*UTF-32BE*, *ISO-8859-X*, *Windows-125X*, *IBMX*, *CP85X*, *macX*, *TIS-620*/*Windows-874*, *KOI8-R*/*KOI8-U*, 7-Bit *ASCII*/*GB1988*, and arbitrary *BINARY* data
 
 ## Color Coding
 
 Each byte of the given string is highlighted using the following mechanism (characters -> codepoints):
 
 - Red for invalid bytes
-- Orange for unassigned bytes/characters
-- Blue for control characters
 - Light blue for blanks
+- Blue for control characters
 - Non-control formatting characters in pink
 - Green for marks (Unicode only)
-- Random color for all other characters
+- Orange for unassigned codepoints
+- Lighter orange for unassigned codepoints which are also ignorable
+- Random color for all other codepoints
 
 ## Setup
 
 Make sure you have Ruby installed and installing gems works properly. Then do:
 
@@ -111,9 +112,10 @@
 ## Notes
 
 Also see
 
 - [Ruby's Encoding class](https://ruby-doc.org/core/Encoding.html)
+- [Symbolify gem](https://github.com/janlelis/symbolify)
 - [Characteristics gem](https://github.com/janlelis/characteristics)
 - [UTF-8 (Wikipedia)](https://en.wikipedia.org/wiki/UTF-8#Description)
 - [UTF-16 (Wikipedia)](https://en.wikipedia.org/wiki/UTF-16#Description)
 - [UTF-32 (Wikipedia)](https://en.wikipedia.org/wiki/UTF-32)
 - [Difference between BINARY and ASCII](http://idiosyncratic-ruby.com/56-us-ascii-8bit.html)