Drop support for Ruby 2.5

It reached EOL with release 2.5.9, and no longer receives patches.

.github/workflows/ruby.yml

@@ -20,7 +20,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0']
+        ruby-version: ['2.6', '2.7', '3.0', '3.1']
         os: [ubuntu-latest, macos-latest]
 
     steps:

.rubocop.yml

@@ -10,7 +10,7 @@ AllCops:
     - 'profile/*'
   DisplayCopNames: true
   NewCops: enable
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.6
 
 # Preferred codebase style ---------------------------------------------
 

README.md

@@ -117,7 +117,7 @@ Man pages have been added. Checkout `man colorls`.
 
 [(Back to top)](#table-of-contents)
 
-1. Install Ruby (preferably, version >= 2.5)
+1. Install Ruby (preferably, version >= 2.6)
 2. [Download](https://www.nerdfonts.com/font-downloads) and install a Nerd Font. Have a look at the [Nerd Font README](https://github.com/ryanoasis/nerd-fonts/blob/master/readme.md) for installation instructions.
 
     *Note for `iTerm2` users - Please enable the Nerd Font at iTerm2 > Preferences > Profiles > Text > Non-ASCII font > Hack Regular Nerd Font Complete.*

colorls.gemspec

@@ -47,7 +47,7 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/athityakumar/colorls'
   spec.license       = 'MIT'
 
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = '>= 2.6.0'
 
   spec.files = IO.popen(
     %w[git ls-files -z], external_encoding: Encoding::ASCII_8BIT

lib/colorls/core.rb

@@ -321,7 +321,7 @@ module ColorLS
     def fetch_string(content, key, color, increment)
       @count[increment] += 1
       value = increment == :folders ? @folders[key] : @files[key]
-      logo  = value.gsub(/\\u[\da-f]{4}/i) { |m| [m[-4..-1].to_i(16)].pack('U') }
+      logo  = value.gsub(/\\u[\da-f]{4}/i) { |m| [m[-4..].to_i(16)].pack('U') }
       name = content.show
       name = make_link(content) if @hyperlink
       name += content.directory? && @indicator_style != 'none' ? '/' : ' '