Fix some typos in docs

README.md

@@ -8,7 +8,6 @@
 [![Security](https://hakiri.io/projects/cf546402fb7117/stacks/622121c74c17f4/622121c74c17f4.svg?repo_token=xo-yGdqDKXvCf-jypXd-)](https://hakiri.io/projects/cf546402fb7117/stacks/622121c74c17f4/shield)
  [![Known Vulnerabilities](https://snyk.io/test/github/omu/nokul/badge.svg)](https://snyk.io/test/github/omu/nokul)
 
-
 [Nokul](https://github.com/omu/nokul) aims to become a complete solution for universities that face many challanges while trying to manage all the complex procedures of a university online.
 
 Dealing with ill-structured processes of a university is hard, especially when they backed with complex legal procedures. Many universities facing similar issues when it comes to automating things, and moving face-to-face operations to online. Nokul aims to remediate these wounds by taking a Turkish university with more than 70 web services, 50K students and 4K employees as a case.

doc/development/app-upgrade.md

@@ -18,14 +18,12 @@ Bağımlılıklar güncellenirken hem nokul uygulamasının, hem de içerdiği p
 
 ```bash
 bundle update
-cd plugins/support && bundle update
-cd plugins/tenant/common && bundle update
-cd plugins/tenant/omu && bundle update
+cd plugins/support && bundle update && cd -
+cd plugins/tenant/common && bundle update && cd -
+cd plugins/tenant/omu && bundle update && cd -
 ```
 
 Version Bump
 ------------
 
-```ruby
-rails release:bump
-```
+`app.json` dosyasından uygulama sürümünü güncelleyin.

doc/development/test-coverage.md

@@ -5,7 +5,7 @@ author: M. Serhat Dundar
 Test Coverage
 =============
 
-Currently coverage reports are being send to Codacy automatically in CI environment. If you would like to generate a
+Currently, coverage reports are being sent to Codacy automatically in CI environment. If you would like to generate a
 local report for yourself (using SimpleCov), you simply need to run tests and view the generated file in
 `coverage/index.html.erb`: