Option to keep spaces before inline comments

Add a keepSpaces or keepSpacesBeforeLineComments similar too keepLines that preserves the spaces between values and inline comments at the end of the line.

This will help to avoid unnecessary changes when formatting tsconfig.json files:

Original:

    /* Language and Environment */
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */

Formatted:

    /* Language and Environment */
    "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */

Diff:

     /* Language and Environment */
-    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */

Inizia leggendo l’opzione keepLines esistente e la pull request collegata, poi segui l’API del formatter che gestisce i commenti inline. Usa gli esempi di tsconfig.json come riferimento per il comportamento: quando la nuova opzione è abilitata, gli spazi prima dei commenti a fine riga devono essere preservati senza modificare le altre formattazioni.