Swap 2006/sloane alt/main code in build/try

As the original entry is too fast for modern systems I have (after
discussion with Landon) made the build and try sections refer to
'sloane.alt' instead of the original entry. The 'alternate section' now
refers to 'sloane' instead. This is a rare case where the reversal of
alt (in this case provided by me) and the original is valuable.

There are other entries where I will end up doing this as well for the
same reason of the entry going too fast in modern systems and these will
be updated in time, now that a method to do it has been established.

2006/sloane/README.md

@@ -7,19 +7,16 @@ US
 ## To build:
 
 ```sh
-make
+make alt
 ```
 
 
 ## To run:
 
 ```sh
-./slone
+./slone.alt
 ```
 
-WARNING: if you are easily overstimulated with fast movement or have
-photosensitivity please be careful running this entry!
-
 An alternatively version of this entry exists so that one can actually see what
 is going on. This is also more ideal for those who are overstimulated by fast
 movements. See the alternate code section below.
@@ -27,31 +24,49 @@ movements. See the alternate code section below.
 
 ## Try:
 
-```sh
+The version we recommend that you use, in order to see what is happening with
-echo "Do or do not. There is no try."
+modern systems, and to not flash too quickly, which can be problematic for some
-```
+people, can be configured to different speeds by way of the value used in
-
+`usleep()`. The default `-DZ=65000` but you can easily change it. To do so try:
-
-### Alternate code:
-
-The alternate version uses `usleep()` so one can enjoy
-the entry with modern systems and which will not be too stimulating for those
-who have a problem with fast moving text (like himself). It uses the `Z` macro
-as the parameter to `usleep()` which you can override. The default is
-`-DZ=65000`. To compile with the default:
-
-
-```sh
-make alt
-```
-
-If you wish to override the sleep value try something like:
 
 ```sh
 make CDEFINE="-DZ=70000" clobber alt
+./sloane.alt
 ```
 
-Use `sloane.alt` as you would `sloane` above.
+If you wish to make it like the original, as if the below 'alternate code' was
+being used, you can do:
+
+```sh
+make CDEFINE="-DZ=0" clobber alt
+./sloane.alt
+```
+
+### Alternate code:
+
+Should you wish to see the original without having to mess with the compiler
+line, try:
+
+```sh
+make clobber all
+./sloane
+```
+
+WARNING: if you are easily overstimulated with fast movement or have
+photosensitivity please be careful running this version and instead see the
+above!
+
+NOTE: again as above, to see what is going on, we recommend that you instead use
+the real alternate code which we described in the [To build](#to-build) and
+[try](#try) sections above.
+
+If however you wish to see the original, try:
+
+```sh
+make clobber all
+```
+
+Use `sloane` as you would `sloane.alt` above.
 
 
 ## Judges' Comments:
@@ -90,11 +105,11 @@ The donut isn't raytraced.  It's much simpler than that.
 
 ### How is it obfuscated?
 
-There are three main pieces to this program: the donut, the checkerboard,
+There are three main pieces to this program: the donut, the checkerboard, and
-and the ASCII logo.  The first two are programmed in a straightforward way
+the ASCII logo.  The first two are programmed in a straightforward way (with
-(with z-buffering even!), but the mathematics for drawing them is
+[z-buffering](https://en.wikipedia.org/wiki/Z-buffering) even!), but the
-"optimized".  The ASCII logo has been shrunk into the smallest I could make
+mathematics for drawing them is "optimized".  The ASCII logo has been shrunk
-it by any means necessary.
+into the smallest I could make it by any means necessary.
 
 The logo can actually be compressed much better (ironically, by doing
 something simpler), but I didn't discover this until well after submitting.

thanks-for-fixes.md

@@ -1479,17 +1479,22 @@ back for arrow keys in the [alternate version](2006/night/night.alt.c).
 
 ## [2006/sloane](2006/sloane/sloane.c) ([README.md](2006/sloane/README.md]))
 
-Cody fixed this entry to work with clang which is stricter on the type of args
+Cody fixed this entry to work with clang which has a defect with the args to
-to main(). Curiously although clang requires the types of args to be strictly
+`main()`: it requires specific types: `int` and `char **` for the first and
-correct it allows for only one arg which he made it as the second arg was not
+latter args. 
-used and this allows for a closer match to the original format of the entry. He
+
-also made sure that the Makefile links in `libm` as not all systems do this by
+Curiously, although clang requires the types of args to be strictly
-default. Since the author suggested that the lack of certain `#include`s might
+correct it allows for only one arg which Cody made it as the second arg was not
-break the program in some systems he added `-include ...` to the Makefile as
+used and this allows for a closer match to the original format of the entry.
-well.
+
+He also made sure that the Makefile links in `libm` as not all systems do this by default.
+
+Since the author suggested that the lack of certain `#include`s might break the
+program in some systems he added `-include ...` to the Makefile as well.
 
 The [alternate version](2006/sloane/sloane.alt.c), which allows one to see what
-is going on in modern systems, was provided by Cody.
+is going on in modern systems, and which we recommend one use _first_, was
+provided by Cody.
 
 
 ## [2006/toledo2](2006/toledo2/toledo2.c) ([README.md](2006/toledo2/README.md]))