fix syntax error

Author: dmurdoch

.github/workflows/R-CMD-check.yaml

@@ -42,4 +42,5 @@ jobs:
           # install full prebuilt version
           TINYTEX_INSTALLER: TinyTeX
 
-      - run: Rscript -e "install.packages(c('tinytex', 'xdvir'));trace(system2, tracer = quote(cat(sprintf('tracing system2: %s\n', paste(c(env, shQuote(command), args), collapse = ' ')))),      print = FALSE); xdvir::grid.latex('text')"
+      - run: Rscript -e "install.packages(c('tinytex', 'xdvir'))"
+      - run: Rscript -e "trace(system2, tracer = quote(cat(paste(c(env, shQuote(command), args), collapse = ' '))),print = FALSE); xdvir::grid.latex('text')"