Dynamic extender line: regression

[Patrick McCarty]

The behavior of the dynamic extender line seems better in 2.10.33 than
in 2.11.52.

Here are the code samples I used for comparison:

%%% Begin .ly snippet %%%

\version "2.10.33"

\paper {
  ragged-right=##t
}

% This example looks good

\relative c'' {
  \setTextCresc
  g4\< a b c\!
}

%%% End .ly snippet %%%

%%% Begin .ly snippet %%%

\version "2.11.52"

% This example does not look as good

\relative c'' {
  \crescTextCresc
  g\< a b c\!
}

%%% End .ly snippet %%%