fix word deletion

README.md

@@ -145,7 +145,7 @@ in your favourite language.*
 * [Scatterplot of first 100](http://www.maurits.vdschee.nl/scatterplot/) -- Scatterplot of the time taken to solve the parts of each puzzle by the first 100 people that solved it.
 * [aocdl](https://github.com/GreenLightning/advent-of-code-downloader) -- Command-line utility that automatically downloads your personal input file while you read the puzzle description *(Go)*.
 * [aocinput](https://github.com/dds/aoc2020/blob/main/cmd/aocinput/aocinput.go) -- CLI for getting inputs. Clipboard support. Polite to AoC. Nice help and options. *(Go)*
-* [aoc_rb](https://github.com/pacso/aoc_rb) -- A gem that generates an empty AoC project, and provides command-line tools for fetching input and submitting solutions  *(Ruby)*
+* [aoc_rb](https://github.com/pacso/aoc_rb) -- A Ruby gem that generates an empty AoC project, and provides command-line tools for fetching input and submitting solutions  *(Ruby)*
 * [aoc-cli](https://github.com/keirua/aoc-cli) -- Command-line utility that helps solve problems in ruby: it downloads your personal input file, creates the sample source files and benchmarks your solutions *(Ruby)*.
 * [AoCHelper](https://github.com/eduherminio/AoCHelper) -- NuGet library that simplifies puzzle solving and provides benchmarking *(.NET)*.
 * [AdventOfCode.Runner](https://github.com/vladsm/adventofcode-runner) -- NuGet package that automatically provides your puzzles solvers with the input from the AOC site and verifies calculated answers *(.NET / C#)*.