enclose options within brackets

songs/parabellum/le_dernier_trocson.sg

@@ -1,7 +1,7 @@
 \selectlanguage{french}
 \songcolumns{1}
 \beginsong{Le dernier trocson}
-  [by=Parabellum,cov=in-vivo-veritas,album=In vivo veritas]
+  [by={Parabellum},cov={in-vivo-veritas},album={In vivo veritas}]
 
   \cover
   \gtab{Dm}{XX0231}

songs/parabellum/osmose_99.sg

@@ -1,7 +1,7 @@
 \selectlanguage{french}
 \songcolumns{2}
 \beginsong{Osmose 99}
-  [by=Parabellum,cov=in-vivo-veritas,album=In vivo veritas]
+  [by={Parabellum},cov={in-vivo-veritas},album={In vivo veritas}]
 
   \cover
   \gtab{C}{3:X02220}

songs/r_e_m/losing_my_religion.sg

@@ -1,7 +1,7 @@
 \selectlanguage{english}
 \songcolumns{2}
 \beginsong{Losing my religion}
-  [by=R.E.M,cov=out-of-time,album=Out of time]
+  [by={R.E.M},cov={out-of-time},album={Out of time}]
 
   \cover
   \gtab{Am}{X02210}

songs/walz/comme_on_dit.sg

@@ -1,7 +1,7 @@
 \selectlanguage{french}
 \songcolumns{2}
 \beginsong{Comme on dit}
-  [by={Walz},,cov={marie_claire},album={Marie-Claire}, url={http://www.lecolporteur.org}]
+  [by={Walz},cov={marie_claire},album={Marie-Claire},url={http://www.lecolporteur.org}]
 
   \cover
   \gtab{G#m}{4:022000}