chore: Reformat READMEs and CONTRIBUTING

Remove trailing whitespace and ensure files end with newlines.

Author: kjarosh

CONTRIBUTING.md

@@ -68,7 +68,7 @@ Ruffle is a young project, and there is still much Flash functionality that is u
 
 ## Debugging ActionScript Content
 
-To enable debug logging, set `RUST_LOG=warn,ruffle=info,ruffle_core=debug,avm_trace=info` and run Ruffle from the command line. 
+To enable debug logging, set `RUST_LOG=warn,ruffle=info,ruffle_core=debug,avm_trace=info` and run Ruffle from the command line.
 This will also enable printing `trace()` statements.
 
 Additionally, if you build Ruffle with `--features avm_debug` then you will activate a few more built-in debugging utilities inside Ruffle, listed below.
@@ -109,7 +109,7 @@ This currently only works for AVM1. We'd [welcome a PR to change that](https://g
 
 ### Render Tree Dumping
 
-The hotkey <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>F</kbd> dumps the DisplayObject render tree at the moment you press it. 
+The hotkey <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>F</kbd> dumps the DisplayObject render tree at the moment you press it.
 This allows you to see Ruffle's representation of the objects on the Stage.
 
 ## Reporting Bugs
@@ -183,7 +183,7 @@ When you run a test SWF, trace output will appear in a file called `flashlog.txt
 * MacOS: `~/Library/Preferences/Macromedia/Flash Player/Logs/`
 * Linux: `$HOME/.macromedia/Flash_Player/Logs/`
 
-There are several ways to create your own test SWFs, which are listed in the sections below. 
+There are several ways to create your own test SWFs, which are listed in the sections below.
 Once you have an `.swf`, run it in the debug Flash Player and copy the output of the trace statements into a file called `output.txt`. Add the `output.txt`, `test.swf` and either the `test.as` or `test.fla` file to a directory under `tests/tests/swfs/avm1` (or `avm2`) named after what your test tests.
 
 Finally, add a `test.toml` in the same directory to control how the test is run - such as how many frames it should take or if we should compare the image it generates. See [tests/README.md](tests/README.md) for information on what the test.toml should look like.

tests/README.md

@@ -71,4 +71,4 @@ sleep_to_meet_frame_rate = false # If true, slow the tick rate to match the movi
 
 `fscommand("quit")` is enabled for tests, and will end the test at the end of this frame or tick.
 
-You can use this to end a test prematurely before the set number of iterations elapses, which may be useful for timer tests.
+You can use this to end a test prematurely before the set number of iterations elapses, which may be useful for timer tests.

web/packages/extension/README.md

@@ -8,7 +8,7 @@ It automatically negotiates with websites that do have Ruffle installed, to ensu
 
 ## Using ruffle-extension
 
-The browser extension works in Chrome, Firefox, and Safari 14+. It can be installed directly from the [Chrome Web Store](https://chromewebstore.google.com/detail/ruffle-flash-emulator/donbcfbmhbcapadipfkeojnmajbakjdc) or [Firefox Add-ons site](https://addons.mozilla.org/firefox/addon/ruffle_rs). 
+The browser extension works in Chrome, Firefox, and Safari 14+. It can be installed directly from the [Chrome Web Store](https://chromewebstore.google.com/detail/ruffle-flash-emulator/donbcfbmhbcapadipfkeojnmajbakjdc) or [Firefox Add-ons site](https://addons.mozilla.org/firefox/addon/ruffle_rs).
 Or to install it manually, you can either download the [latest release](https://github.com/ruffle-rs/ruffle/releases) or [build it yourself](../../README.md), then follow the instructions below.
 
 ### Chrome

web/packages/extension/safari/README.md

@@ -4,4 +4,4 @@ macOS.
 The binary this crate produces is intended to be bundled into an `.appex`
 package along with the contents of the `packages/macOS` directory, in the same
 way that the Desktop binary is packaged for macOS. The compiled web extension
-itself should be placed in the package's `Contents/Resources` directory.
+itself should be placed in the package's `Contents/Resources` directory.

web/packages/selfhosted/README.md

@@ -13,7 +13,7 @@ For more examples and in-depth documentation on how to use Ruffle on your websit
 ### Host Ruffle
 
 The `selfhosted` package is configured for websites that do not use bundlers or npm and just want
-to get up and running. If you'd prefer to use Ruffle through npm and a bundler, please 
+to get up and running. If you'd prefer to use Ruffle through npm and a bundler, please
 [refer to ruffle core](https://github.com/ruffle-rs/ruffle/tree/master/web/packages/core).
 
 Before you can get started with using Ruffle on your website, you must host its files yourself.