add files generated by the autotool m4.

Fix failure to ignore Simulink autosave files

Remove double-spaced lines

`.autosave` does not match the name of autosave file generated by
simulink. A leading asterisk(*) is needed to match such name.

Add exclusion for OpenCover UI results

ignore logs on /administrator/logs/*

clarifying when ignoring is not required

Add names of backup folders created by terrarium

add MANIFEST to Python.gitignore

Add extended DVI (XDV) to TeX.gitignore

Updates Elixir gitignore file

Added link to source

Update Terraform.gitignore - ignore terraform.tfvars

.DS_Store is a file name, not an extension

Adds some files

Node - update Compiled binary addons link to https

Node.gitignore build/Release Compiled binary addons: http to https
https://nodejs.org/api/addons.html

Nanoc: Ignore tmp/nanoc/, not tmp/

Updating Swift.gitignore with Package.resolved

Add default file, README in libraries and translations in Drupal

Add QML and JS cache files to Qt.gitignore

Add gitignore for Kotlin

'*.tfstate.*.backup' added to Terraform.gitignore

Adds .gitignore rules for AxoCover

AxoCover is a Code Coverage Tool. It creates a **.axoCover** folder where are created:
- settings in settings.json
- sub-folders into **run** folder which contain code coverage results.

All content into **.axoCover** folder must be ignored except the **settings.json** file.

Fix comments on same line causing ignore to break

Symfony.gitignore: add web server pid file

Since Symfony 3.3, WebServerBundle creates a `.web-server-pid` file when embedded server is running.
Official blog post: http://symfony.com/blog/new-in-symfony-3-3-webserverbundle

Remove TODO from VS.gitignore

Updated Smalltalk.gitignore