Merge branch 'vzagorodny-clarify-shell-cmds-link-title' into 'master'

Clarify "Shell commands" link title in style guide doc

See merge request gitlab-org/gitlab-ee!10750

doc/development/contributing/style_guides.md

@@ -10,7 +10,7 @@
 1. [Testing][testing]
 1. [JavaScript styleguide][js-styleguide]
 1. [SCSS styleguide][scss-styleguide]
-1. [Shell commands](../shell_commands.md) created by GitLab
+1. [Shell commands (Ruby)](../shell_commands.md) created by GitLab
    contributors to enhance security
 1. [Database Migrations](../migration_style_guide.md)
 1. [Markdown](http://www.cirosantilli.com/markdown-styleguide)