add a missing '\n', remove some unwanted ones

From /dev/humancontroller.

code/cgame/cg_particles.c

@@ -1275,7 +1275,7 @@ void CG_ParticleExplosion (char *animStr, vec3_t origin, vec3_t vel, int duratio
 			break;
 	}
 	if (!shaderAnimNames[anim]) {
-		CG_Error("CG_ParticleExplosion: unknown animation string: %s\n", animStr);
+		CG_Error("CG_ParticleExplosion: unknown animation string: %s", animStr);
 		return;
 	}