Format/typo check 2018/giles/README.md

2018/giles/README.md

@@ -1,82 +1,13 @@
 ## To build:
 
-This entry requires SDL2 to be installed.
+This entry requires SDL2 to be installed. See [FAQ 3.8: How do I compile an
+IOCCC winner that requires SDL1 or SDL2?](/faq.md#SDL) if you don't have it
+installed and don't know how to do so.
 
 ```sh
 make
 ```
 
-### To install SDL and SDL2:
-
-#### macOS users (Homebrew)
-
-If you have not already done so, install [Homebrew](https://brew.sh).
-
-Then to install SDL and SDL2, execute the following command:
-
-```sh
-brew install sdl2 sdl12-compat
-eval "$(/opt/homebrew/bin/brew shellenv)"
-```
-
-#### macOS users (MacPorts)
-
-Install [MacPorts](https://www.macports.org/install.php).
-
-Then to install SDL and SDL2:
-
-```sh
-sudo port install libsdl libsdl2
-```
-
-#### Red Hat Linux users:
-
-To install SDL and SDL2, execute the following command as root:
-
-```sh
-dnf install SDL2 SDL2-devel sdl12-compat sdl12-compat-devel
-```
-
-It was once possibly necessary to use `make` like:
-
-```sh
-make ... SDL2_INCLUDE_ROOT=/usr
-```
-
-or set the following environment variable:
-
-```sh
-export SDL2_INCLUDE_ROOT=/usr
-```
-
-but this is most likely unneeded as we use `sdl-config` and `sdl2-config` in the
-Makefiles.
-
-#### Debian users
-
-To install SDL and SDL2, execute the following command as root:
-
-```sh
-apt install libsdl1.2debian libsdl1.2-dev libsdl2-dev
-```
-
-It was once possibly necessary to use `make` like:
-
-```sh
-make ... SDL2_INCLUDE_ROOT=/usr
-```
-
-or set the following environment variable:
-
-```sh
-export SDL2_INCLUDE_ROOT=/usr
-```
-
-but this is most likely unneeded as we use `sdl-config` and `sdl2-config` in the
-Makefiles.
-
-See also the judges' remarks below.
-
 
 ## To use:
 
@@ -97,20 +28,12 @@ See also the judges' remarks below.
 
 ## Judges' remarks:
 
-Can you explain the behavior of the program when ioccc.txt is given to it as input?
+Can you explain the behavior of the program when [ioccc.txt](ioccc.txt) is given
+to it as input?
 
 How would the description of the state machine look like when translated from
 Polynomish to English?
 
-You may have to install libsdl2-dev on your system to compile and use this code:
-
-```sh
-sudo dnf install SDL2 SDL2-devel # Linux
-sudo apt install libsdl2-dev 	 # Debian
-brew install sdl2		 # macOS via Homebrew
-sudo port install libsdl2	 # macOS via MacPorts
-```
-
 
 ## Author's remarks:
 
@@ -121,7 +44,8 @@ It uses SDL to draw the interface.
 
 The code makes the following assumptions about the underlying system:
 
-* SDL2 is installed from [https://libsdl.org](https://libsdl.org).
+* SDL2 is installed from [https://libsdl.org](https://libsdl.org) or your
+package manager.
 * `double` is an IEEE 754 floating-point type and `sizeof(double)==8`.
 * The compiler supports the C99 standard.
 
@@ -129,7 +53,7 @@ In order to simulate the motion of the sand, a cellular automaton is used. The
 state transition table is not stored directly. Instead, the program stores the
 coefficients of a polynomial that map each state to the correct one. These
 coefficients are stored as raw hexadecimal in the `V[]` array, and they are
-reinterpreted as doubles when used. This allows more numeric precision in fewer
+reinterpreted as `double`s when used. This allows more numeric precision in fewer
 characters (base 16 > base 10), and makes the purpose of the array less clear.
 
 The code is laid out graphically as a bucket pouring sand, and it is far easier