Accept short directive names

Files in the wild use {t}, {st} and {c}; the latter made a song lose all
its section comments.

diff --git a/chordpro-web.js b/chordpro-web.js
index cb5ea81761aa35007f94d5ad5ea321be59c07728..5f5ba2f715ce9d67beec3285329a22715430a6be 100644 (file)
--- a/chordpro-web.js
+++ b/chordpro-web.js
@@ -23,6 +23,10 @@ const directive_handlers = {
     },
     comment: value => html`<p class="comment">${value}</p>`,
 };
+// short forms
+directive_handlers.t = directive_handlers.title;
+directive_handlers.st = directive_handlers.subtitle;
+directive_handlers.c = directive_handlers.comment;
 
 function renderChordpro(text) {
     const song = [];