## alphamirror
### Instructions
Write a program called `alphamirror` that takes a `string` as argument and displays this `string` after replacing each alphabetical character with the opposite alphabetical character.
The case of the letter remains unchanged, for example :
'a' becomes 'z', 'Z' becomes 'A'
'd' becomes 'w', 'M' becomes 'N'
The final result will be followed by a newline (`'\n'`).
Refactor & Beautify & destruction commit
return early, remove else branches, reorder conditions and top-level functions, remove empty lines, remove unnecessary append(), fix typos, stop using testing package, remove dead code, fix mistakes in subjects, tests and solutions, remove disclaimers, reformat comments, simplify solutions, tests, add more instructions to subjects, remove obsolete files, etc.
Some of the reasons behind those modifications will be added to good-practices.en.md
Some of the exercises are now broken, they will have to be fixed, most of them have a "TODO:" comment.
5 years ago
If the number of arguments is different from 1, the program displays nothing.
### Usage
```console
$ go run . "abc"
zyx
$ go run . "My horse is Amazing." | cat -e
Nb slihv rh Znzarmt.$
$ go run .
$
```
