- Remove a reminder to look at files that don't exist anymore
- Remove ignore rules for an IDE from 2007
- Remove an ignore rule for Gcc which is no longer used since 2013

**Reasons for making this change:**

Workspace file can allow you to have an individual VS Code setting file for each project, which is useful for monorepo-based development.

You can find an example on [lit/lit/lit-next.code-workspace](https://github.com/lit/lit/blob/08f60328abf83113fe82c9d8ee43dc71f10a9b77/lit-next.code-workspace).

**Links to documentation supporting these rule changes:**

https://code.visualstudio.com/docs/editor/multi-root-workspaces#_workspace-file

Co-authored-by: NZhengYuan Loo <loozhengyuan@users.noreply.github.com>

This will add support for the default location the Local History extension for Visual Studio Code uses.
See https://marketplace.visualstudio.com/items?itemName=xyz.local-history

AS far as I can tell this .gitignore also applies to Rider. Looking at the somewhat official .gitignore for Rider [here](https://github.com/JetBrains/resharper-rider-samples/blob/master/.gitignore), it seems compatible.

* add alternative sftp settings file

* update for possible multiple alt* numbered files

The project description file.

Since IntelliJ 2019.3 this file appeared in our git changes. It seems these are just cached information about remote repositories that are defined in Maven/Gradle.

In our IntelliJ projects where we are using Gradle, the file .idea/compiler.xml and files inside the .idea/artifacts folder are automatically generated by IntelliJ based on the Gradle build model. As these files are generated, they should be ignored in version control.

Added ignore for workspace files (*.code-workspace). They can be added in any directory, depending on the user's preferences.

.svg files are more often than not vector files. You need to exceed 36 swap files for a .svg file to come from Vim.

from vim's documentation on `:mksession` (:help :mksession):

 ...

 10. If a file exists with the same name as the Session file, but ending
     in "x.vim" (for eXtra), executes that as well.  You can use *x.vim
     files to specify additional settings and actions associated with a
     given Session, such as creating menu items in the GUI version.

we already have Session.vim ignored.  the Sessionx.vim file, like
Session.vim, is a user file.  a user would generally want that file kept
private or for themselves, and the public or a team fetching from or
sharing the repository generally have no interest in a file relevant
only to a particular user.  so it's a good idea to get git to help us
avoid mistakenly sharing the file.

Actually, the log generated by debug mode is *.log
i.e. ubuntu-xenial-16.04-cloudimg-console.log

When IntelliJ project is created as a file-based (i.e. without `.idea` folder, but with `.iws`, `.iml` and `.ipr` files), and this is a Gradle or Maven project with auto-import, should ignore them as well for the same reason we ignore `.idea` folder content in that case.

Netbeans Linux and Windows Makefile-*.mk and Package-*.bash files in nbproject directories are automatically generated during compile.  These files are continually updated, which can cause a long list of unnecessary files to add, commit, and push (or that are Untracked).  This has been experienced for Linux and Windows C++ projects.  Helpful supporting link: https://stackoverflow.com/questions/27490608/netbeans-c-and-git

Refs: http://network-security.data

See this SO post: https://stackoverflow.com/questions/49557737/should-i-add-idea-caches-build-file-checksums-ser-to-gitignore

and this Google issue tracker ticket: https://issuetracker.google.com/issues/77544553

for justification.