Edit file

I am using git to edit an app in facebook through heroku in the terminal itself. here is the site below and i want to change the welcome line bit.
https://fierce-spring-7515.herokuapp.com/


After logging in i want to edit the index.php file and am trying to doso and enter

vim index.php

then qui to edit the file but how do i save it. It is not saving ...

Is there a way to use a known editor like notepad++ or editplus for this
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Moizsaif123Asked:
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Justin_EdmandsCommented:
After you finish editing with vim, how are you quitting?
Hit Esc, then type ":wq" to write the file then quit.
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Moizsaif123Author Commented:
yep that answered my question, points are yours. Just wanted to know if using a database within heroku git is possible...mssql if so...

iv used below to add database

heroku addons:add shared-database

another question, how do i get commands list or help using git
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