Reformat package.ily file

Objectives:
- limit line lengths
- improve readability

Author: uliska

package.ily

@@ -36,13 +36,21 @@
 
 %%%% export music
 % filebase: file basename - suffix (.krn/.xml) is taken from the exporter
-% exporter: symbol or function: hum -> humdrum, xml -> musicXML, not implemented yet: [l]mei -> [L-]MEI, lily -> LilyPond
+% exporter: symbol or function: hum -> humdrum, xml -> musicXML,
+%           not implemented yet: [l]mei -> [L-]MEI, lily -> LilyPond
 %           or an exporter function #(lambda (export-tree filename . options) ...)
 % music: the music to export
 #(define (symbol-or-procedure? v) (or (symbol? v)(procedure? v)))
 exportMusic =
-#(let ((exporters `((xml . ,exportMusicXML)(hum . ,exportHumdrum)(lily . ,exportLilyPond))))
-   (define-void-function (filebase exporter music)((string? (ly:parser-output-name)) symbol-or-procedure? ly:music?)
-     (if (symbol? exporter) (set! exporter (ly:assoc-get exporter exporters exportMusicXML #t)))
-     (ly:run-translator (ly:score-music (scorify-music music)) (FileExport `((filebase . ,filebase)(exporter . ,exporter)) ))
-     ))
+#(let
+  ((exporters
+    `((xml . ,exportMusicXML)
+      (hum . ,exportHumdrum)
+      (lily . ,exportLilyPond))))
+  (define-void-function (filebase exporter music)
+    ((string? (ly:parser-output-name)) symbol-or-procedure? ly:music?)
+    (if (symbol? exporter)
+        (set! exporter (ly:assoc-get exporter exporters exportMusicXML #t)))
+    (ly:run-translator
+     (ly:score-music (scorify-music music))
+     (FileExport `((filebase . ,filebase)(exporter . ,exporter))))))