Add comments.

tracy/tracy/inc/tracy_global.h

@@ -56,7 +56,7 @@ typedef struct globvalrec {
   double        Qb,             // bunch charge
                 D_IBS[DOF];     // diffusion matrix (Floquet space)
   Vector        wr, wi;         // real and imaginary part of eigenvalues
-  Vector3       eps,            // 3 motion invariants
+  Vector3       eps,            // 3 motion invariants, emittance?
                 epsp;           /* transverse and longitudinal projected
 				   emittances */
   int           RingType;       // 1 if a ring (0 if transfer line)

tracy/tracy/src/mathlib.cc

@@ -194,7 +194,7 @@ double normranf(void)
 }
 #undef maxiter
 
-
+/* convert degree to radian */
 double dtor(const double d) { return (d*M_PI/180.0); }