Commits on Aug 29, 2024

1. Add ansi-color-specifier? …

   So the user can check if an object is one of the symbols that specify
   ANSI colors. This can be useful when writing code that takes those as
   argument:
   
   ```
   (define-method ascii-draw ((s <shape>) color)
    ;; we should check if color is a valid color here
    ...
    )
   ```
   
   And... Since we're at it, why not add a method to obtain the full list
   also? :)
   
   ```
   (ansi-color-specifier-list)
     => (normal bold no-bold italic no-italic underline no-underline blink
         no-blink reverse no-reverse black bg-black red bg-red green
         bg-green yellow bg-yellow blue bg-blue magenta bg-magenta cyan
         bg-cyan white bg-white)
   ```
   
   In order to do this, we include the `set!`s of all lambdas that define
   procedures for ANSI color stuff under the lambda that defines the
   color alist.

   

   jpellegrini committed Aug 29, 2024
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