[IMP] composer: prettify formula when content is too long.

Prettify formula depending on the composer width and the content width,
for consistency, change the formula font to monospace font

task: 4735172

Author: laa-odoo

src/components/composer/composer/prettifier_content.ts

@@ -33,7 +33,7 @@ function join(rules: PrettifyRule[]): Concat {
   return { type: "concat", rules };
 }
 
-/** Useful for indicating where to unify multiple rules into a single line depending on the available space.*/
+/** Useful for indicating where to print a rule into a single line depending on the available space.*/
 function group(x: PrettifyRule): ChooseBetween {
   return chooseBetween(flatten(x), x);
 }