fixup! More tweaks

en/documentation/index.md

@@ -43,23 +43,23 @@ The authoritative Ruby language documentation at [docs.ruby-lang.org][docs-rlo-e
 #### Beginner
 
 [Programming Ruby 3.3][pickaxe]
-: The seminal work on Ruby in English. Recently updated to ruby 3.3.
+: The seminal work on Ruby in English. Recently updated to Ruby 3.3.
 
 [The Well-Grounded Rubyist][grounded]
 : A tutorial that begins with your first Ruby program and takes you all the way to sophisticated topics like reflection, threading, and recursion.
 
 #### Intermediate
 
 [Practical OOD in Ruby (POODR)][poodr]
-: A programmers tale about how to write object-oriented code.
+: A programmer's tale about how to write object-oriented code.
 
 #### Expert
 
 [Metaprogramming][meta]
 : Explains metaprogramming in a down-to-earth style.
 
 [Ruby Under a Microscope (RUM)][microscope]
-: An illustrated guide to ruby internals.
+: An illustrated guide to Ruby internals.
 
 ### Reference Documentation
 
@@ -80,21 +80,21 @@ The authoritative Ruby language documentation at [docs.ruby-lang.org][docs-rlo-e
 : Easily find and browse Ruby classes, modules, and methods.
 
 [ruby-doc.org][39]
-: online API documentation
+: Online API documentation
 
 [DevDocs.io][40]
-: online API documentation
+: Online API documentation
 
 [Ruby QuickRef][42]
-: The ruby quick reference
+: The Ruby quick reference
 
 [rubyreferences][43]
 : A full language reference + detailed language changelog. Fantastic.
 
 ### Style Guides
 
 [rubystyle.guide][44]
-: Rubocop's Ruby style guide
+: RuboCop's Ruby style guide
 
 [RuboCop][45]
 : Automated enforcement of their style guide.
@@ -106,7 +106,7 @@ The authoritative Ruby language documentation at [docs.ruby-lang.org][docs-rlo-e
 : Gitlab's Ruby style guide
 
 [Airbnb][48]
-: AirBNB's Ruby style guide
+: Airbnb's Ruby style guide
 
 [w3resource][49]
 : W3's Ruby style guide