set values for doc template in prep_trajectory() (#595)

Author: cjyetman

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: r2dii.plot
 Title: Visualize the Climate Scenario Alignment of a Financial Portfolio
-Version: 0.5.0.9000
+Version: 0.5.0.9001
 Authors@R: 
     c(person(given = "Monika",
              family = "Furdyna",

R/prep_trajectory.R

@@ -6,6 +6,8 @@
 #' `region`, `scenario_source`.
 #' * (Optional) If present, the column `label` is used for data labels.
 #' @template convert_label
+#' @templateVar fun qplot_trajectory
+#' @templateVar value recode_metric_trajectory
 #' @param span_5yr Logical. Use `TRUE` to restrict the time span to 5 years from
 #'   the start year (the default behavior of `qplot_trajectory()`), or use
 #'   `FALSE` to impose no restriction.