style: avoid {} if not needed

Author: MichaelChirico

R/merge.R

@@ -97,9 +97,8 @@ merge.data.table = function(x, y, by = NULL, by.x = NULL, by.y = NULL, all = FAL
     y = y[yind]
   }
 
-  dt = tryCatch({
-      y[x, nomatch=if (all.x) NA else NULL, on=by, allow.cartesian=allow.cartesian]
-    },
+  dt = tryCatch(
+      y[x, nomatch=if (all.x) NA else NULL, on=by, allow.cartesian=allow.cartesian],
     dt_bmerge_incompatible_type_error = function(e) {
       x_part_col_name = e$bmerge_i_arg_col_name
       x_part_type     = e$bmerge_i_arg_type