New features in 2.18 since 2.16
*******************************
+ * The PostScript functionality of stroke adjustment is no longer
+ applied automatically but left to the discretion of the PostScript
+ device (by default, Ghostscript uses it for resolutions up to
+ 150dpi when generating raster images). When it is enabled, a more
+ complex drawing algorithm designed to benefit from stroke
+ adjustment is employed mostly for stems and bar lines.
+
+ Stroke adjustment can be forced by specifying the command line
+ option `-dstrokeadjust' to LilyPond. When generating `PDF' files,
+ this will usually result in markedly better looking `PDF' previews
+ but significantly larger file size. Print quality at high
+ resolutions will be unaffected.
+
* There is now a new context type called `NullVoice' which, while not
appearing in the printed output, can be used to align lyrics.
This can be particularly convenient when used in parallel with a