Fix fret ruler extension parsing scales

extensions/fablabchemnitz/fret_ruler/scales/temp53ebt.scl

@@ -0,0 +1,58 @@
+! temp53ebt.scl
+!
+Cycle of 53 equal beating thirds                                                
+ 53
+!
+ 22.60521
+ 45.67215
+ 68.21759
+ 91.22434
+ 113.71172
+ 136.65999
+ 159.09096
+ 181.98241
+ 204.35856
+ 227.19480
+ 249.51767
+ 272.30024
+ 294.57132
+ 317.30173
+ 339.52248
+ 362.20217
+ 384.37398
+ 407.00436
+ 430.09666
+ 452.66655
+ 475.69794
+ 498.20907
+ 521.18128
+ 543.63533
+ 566.55004
+ 588.94862
+ 611.80745
+ 634.15212
+ 656.95666
+ 679.24894
+ 702.00069
+ 724.24205
+ 746.94249
+ 769.13433
+ 791.78490
+ 814.89752
+ 837.48702
+ 860.53814
+ 883.06832
+ 906.05971
+ 928.53226
+ 951.46561
+ 973.88217
+ 996.75911
+ 1019.12126
+ 1041.94340
+ 1064.25266
+ 1087.02152
+ 1109.27939
+ 1131.99647
+ 1154.20436
+ 1176.87109
+ 2/1