Vim — Hello World

This is originally meant to be easy, but I ran into a few problems
setting this up.

1. Vader. I've seen it used before, but I just hadn't gotten into it as
   a testing framework. It's basically like RSPec but for Vimscript. I
   had to get this installed, no problem. Once that was up, I could run
   Vader tests.
2. For some reason, after I changed the text in the function, it did not
   reload the function in Vim even after I re-sourced the file. I don't
   know if it's cos I was recording the session through a streaming
   software while I tried to code, or something was just wrong with my
   setup. I had to quit Vim altogether and return; then I could source
   the right function into the Vim runtime, and pass my Vader tests.
3. I had originally thought to stream this… but I am quickly realizing
   my choice of using a Macbook Air was because I didn't plan to be
   heavy on audiovisuals. If there's some Vim Teletype-type plugin, that
   would be ideal. Until I am doing this on a more powerful computer,
   there'll be no streaming

vimscript/hello-world/HELP.md

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+# Help
+
+## Running the tests
+
+Open your solution:
+
+```bash
+$ vim <exercise>.vim
+```
+
+Source the current file to make its global functions available to Vim:
+
+```
+:source %
+```
+
+Run the tests:
+
+```
+:Vader <exercise>.vader
+```
+
+Replace `<exercise>` with your exercise's name.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit hello_world.vim` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Vim script track's documentation](https://exercism.org/docs/tracks/vimscript)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [Learn Vimscript the Hard Way](http://learnvimscriptthehardway.stevelosh.com)
+- [IBM DeveloperWorks: Scripting the Vim
+  editor](http://www.ibm.com/developerworks/views/linux/libraryview.jsp?sort_order=asc&sort_by=Title&search_by=scripting+the+vim+editor)
+- [/r/vimscript](https://www.reddit.com/r/vimscript) is the Vimscript subreddit.
+- [StackOverflow](http://stackoverflow.com/) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.

vimscript/hello-world/README.md

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+# Hello World
+
+Welcome to Hello World on Exercism's Vim script Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+## Source
+
+### Created by
+
+- @mhinz
+
+### Contributed to by
+
+- @kotp
+- @kytrinyx
+
+### Based on
+
+This is an exercise to introduce users to using Exercism - http://en.wikipedia.org/wiki/%22Hello,_world!%22_program

vimscript/hello-world/hello_world.vader

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+"
+" Version: 1.1.0
+"
+
+Execute (Say Hi!):
+  let g:expected = "Hello, World!"
+  AssertEqual g:expected, Hello()

vimscript/hello-world/hello_world.vim

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+function! Hello() abort
+  return "Hello, World!"
+endfunction