Fix description

README.md

@@ -1,14 +1,14 @@
 # intro-to-github
 This is a demo repository to practice using GitHub.
 
-It has two files in the *Code* tab:
-- *README.md* is the description of this repo (you are currently reading it)
-- *.gitignore* is a file that specifies which filse and directories must be ignored by Git
+It has two files in the **Code** tab:
+- **README.md** is a file that describes this repo (you are currently reading it)
+- **.gitignore** is a file that specifies which files and directories must be ignored by Git
 
-You cannot make changes in these files directly because you are not collaborator.
+You cannot directly modify files in this repo because you are not a *collaborator*.
 
-The *Issues* tab is used to discuss ideas, enchacements, bugs, questions, and so on. They are grouped by *Open* and *Closed*.
+The **Issues** tab is used to discuss ideas, enchacements, bugs, questions, and so on. They are grouped by *Open* and *Closed*.
 
-The *Pull requests* tab contains proposals to make some changes in the files located in the repository. Repo's owners may review a request and put your changes if they look good.
+The **Pull requests** tab contains proposals to make some changes in the files located in the repository. Repo's owners may review a request and put your changes if they look good.
 
 You can create an *Issue* or make a *Pull request* to contribute in the project.