Update 2012/deckmyn - try.sh, bugs.md, formatting

The try.sh script is as usual.

The bugs.md has some features, not bugs.

The README.md file has been format/typo checked.

The deckmyn.md file has been format/typo checked.

A caveat with this entry is I was not able to verify as much when it
comes to checking things as I do not have a musical background (despite
the fact my family is full of musicians).

2012/deckmyn/README.md

@@ -5,19 +5,28 @@ make
 ```
 
 
+### Bugs and (Mis)features:
+
+The current status of this entry is:
+
+```
+STATUS: INABIAF - please **DO NOT** fix
+```
+
+For more detailed information see [2012 deckmyn in bugs.md](/bugs.md#2012-deckmyn).
+
+
 ## To use:
 
-A shell interpreter with proper backtick interpolation is required.
-
 ```sh
-./deckmyn "`cat deckmyn.c`" "`cat musicfile.txt`" > sheetmusic.pbm
+./deckmyn "$(cat deckmyn.c)" "$(cat musicfile.txt)" > sheetmusic.pbm
 ```
 
 
 ### Try:
 
 ```sh
-./deckmyn "`cat deckmyn.c`" "`cat example_greensleeves`" > greensleeves.pbm
+./try.sh
 ```
 
 
@@ -26,15 +35,21 @@ A shell interpreter with proper backtick interpolation is required.
 The C of this entry is definitely sharp. The program cleverly uses its own
 source at runtime to define the notes, time signature and accidental bitmaps.
 
-In addition to sheet music, this program is also able, given the right input,
-to generate an image of a 10-pin [DIP
+In addition to sheet music, this program is also able to, given the right input,
+generate an image of a 10-pin [DIP
 chip](https://en.wikipedia.org/wiki/Dual_in-line_package) (a sound processor?).
 
-Ironically, the way this entry is called from the command line is an abuse of [C
-Shell](https://en.wikipedia.org/wiki/C_shell).
+
+### Historical remarks:
+
+We previously wrote that ironically, the way this entry is called from the
+command line is an abuse of [C Shell](https://en.wikipedia.org/wiki/C_shell).
 Please use [Bourne-family shells](https://en.wikipedia.org/wiki/Bourne_shell) to
 run this entry.
 
+... but in 2023 we changed the backticks to be the bash `$(..)` construct. This
+is not done in the author's remarks, however.
+
 
 ## Author's remarks:
 
@@ -42,18 +57,36 @@ run this entry.
 
 You need the source code and example input (either one of the example files, or
 manual input as below) ready and a program capable of showing [.pbm bitmap
-format](https://en.wikipedia.org/wiki/Netpbm).
+format](https://en.wikipedia.org/wiki/Netpbm) images.
 
 ```sh
 ./deckmyn "`cat deckmyn.c`" "`cat example_greensleeves`" > greensleeves.pbm
+```
+
+If you have macOS you can open the image like:
+
+```sh
 open greensleeves.pbm
 ```
 
+... otherwise, you'll have to open it in your viewer of choice how you would
+normally open an image.
+
+
 ```sh
 ./deckmyn "`cat deckmyn.c`" "KF m44c4 c4 g4 g4 :  a4 a4 g2 :; " > short_bass.pbm
+```
+
+If you have macOS you can open the image like:
+
+```sh
 open short_bass.pbm
 ```
 
+... otherwise, you'll have to open it in your viewer of choice how you would
+normally open an image.
+
+
 ### Description
 
 Every major C competition should have an entry capable of producing C major.
@@ -70,7 +103,7 @@ The program expects *two command line arguments*. The first is a (very long)
 string that contains the complete music font. Note that it should *not* be given
 as a file name! The default music font is encoded in the (whitespace of the)
 source code [deckmyn.c](deckmyn.c) itself. Therefore, the first argument should
-be `"cat deckmyn.c"`.
+be `"`` ` ``cat deckmyn.c`` ` ``"`.
 
 The second command line argument is the music itself. This is, again, a string,
 not a file name. All music signs are entered as tokens of exactly 3 characters.
@@ -78,21 +111,23 @@ The code is very sensitive to bad spacing! So for instance, if you use a file to
 write the music (e.g. [example\_greensleeves](example_greensleeves)), you should
 keep in mind that newline is also a character!
 
+
 ### Internals
 
 To minimise the memory footprint, this program has *no variable declarations at
 all*, except for the arguments to `main()`. The only available memory space is
 from the command line arguments and count (`argv` and `argc`). Parts of `argv`
-are cast as integer when values under 0 or beyond 127 are expected.
+are cast as `int` when values under 0 or beyond 127 are expected.
 
 The "music font" is defined by the source code itself. The first few lines are
-not part of the font definition, as this memory space will modified by the
+not part of the font definition, as this memory space will be modified by the
 program. (So as required by the rules, it is only a (memory) copy of the source
 code that is modified.)
 
-As there is no memory available, output is directly to stdout, byte by byte,
+As there is no memory available, output is directly to `stdout`, byte by byte,
 from the top left to the bottom right pixel.
 
+
 ### LIMITATIONS
 
 The memory locations of `argv` are used for various purposes. Therefore, the
@@ -107,17 +142,18 @@ only error checking available. Any input that is not according to the rules in
 the [manual](deckmyn.md), may cause errors.
 
 The program has no special hardware limitations or requirements, other than 8bit
-char (signed or unsigned) and two's complement negatives.
+`char` (`signed` or `unsigned`) and two's complement negatives.
 
-The limitations of using char as counters for e.g. the number of music staves
+The limitations of using `char` as counters for e.g. the number of music staves
 are minor. 127 staves to a page is rather a lot.
 
+
 ### Obfuscations
 
 The code has no declared variables other than the command line variables. Not
 even pointers (we all know how messy code can get with too many pointers!). As
 more than one variable needs values beyond 127, parts of the command line memory
-are cast as integer using a macro.
+are cast to `int` using a macro.
 
 - The formatting of the code is in fact necessary, as this is the definition of
 the music font. It is therefore not an obfuscation.
@@ -133,7 +169,7 @@ by replacing some numbers by a character representation. On average, therefore,
 it is not an obfuscation.
 - Randomly changing the way the elements of `argv` are addressed is a matter of
 maintaining a diversified code base. It is therefore not... Oh all right.
-- The actual output of the music is done by one print command including a 800+
+- The actual output of the music is done by one `printf(3)` call including a 800+
 character nested conditional expression.
 - `printf()` is also used for its return value.