Update README

Author: nikoskoukis-slamcore

README.md

@@ -65,7 +65,8 @@ Javascript | :heavy_check_mark: | :x:
 PHP        | :heavy_check_mark: | :heavy_check_mark:
 Python     | :heavy_check_mark: | :heavy_check_mark:
 R          | :heavy_check_mark: | :heavy_check_mark:
-Ruby       | :heavy_check_mark: | :heavy_check_mark: 
+Ruby       | :heavy_check_mark: | :heavy_check_mark:
+Rust       | :x:                | :x:
 Shell      | :heavy_check_mark: | :heavy_check_mark:
 Vim        | :heavy_check_mark: | :heavy_check_mark:
 
@@ -118,8 +119,6 @@ debugstring depends on the following vim plugins:
 
 Plugin also utilizes [vim-repeat](https://github.com/tpope/vim-repeat) if the latter is installed.
 
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 ### Manual installation
 
 Copy the plugin files to their corresponding directories under `${HOME}/.vim`