#' is no longer needed with \tag

[Paul Morris]

Hi everyone,  I just discovered that just like with \override, in 2.17 you no 
longer need to use #' with \tag.  This is a really nice improvement!  It makes 
tags feel much more lightweight to use, and everything is easier on the eyes.  

Dotted lists work too!  Instead of:
  \removeWithTag #'aa 
  \removeWithTag #'bb
  \removeWithTag #'cc
  \tag #'aa \tag #'bb \tag #'cc { g1 }

or:
  \removeWithTag #'(aa bb cc)
  \tag #'(aa bb cc) { g1 }

You can just write:
  \removeWithTag aa.bb.cc
  \tag aa.bb.cc { g1 }

I didn't realize this before because it's not shown in the 2.17 manuals yet: 
http://lilypond.org/doc/v2.17/Documentation/notation/different-editions-from-one-source#using-tags

I think it's definitely worth adding it to this list on the changes page:
Several commands now accept symbol lists (conveniently entered as dot-separated 
words) for various kinds of arguments. These include ‘\accidentalStyle’, 
‘\alterBroken’, ‘\footnote’, ‘\hide’, ‘\omit’, ‘\overrideProperty’, ‘\shape’, 
and ‘\tweak’.
http://lilypond.org/doc/v2.17/Documentation/changes/index.html

I believe David Kastrup deserves the credit for this improvement, so thank you 
David!  And while I'm at it, thanks to the whole dev team for all of their work 
on LilyPond!

-Paul


Here's a demo snippet:

\version "2.17.95"

\removeWithTag aa
{
  f' g'
  \tag aa { a' b' }
  c'' d''
}

\removeWithTag bb
{
  f'-1 g'-2
  a'-\tag bb -3
  b'-\tag bb -4
  c''-5 d''-6
}

\removeWithTag aa.bb.cc
{
  f'
  \tag aa.bb { g' a' }
  \tag cc.dd { b' c'' }
  d''
}