Warning from yaml::yaml.load when using compile_reports()

[thibautjombart]

Please place an "x" in all the boxes that apply

• I have the most recent version of reportfactory and R
• I have found a bug
• I have a reproducible example
• I want to request a new feature

---

Just to flag the following warning compiling a (parametrised) Rmd report:

> compile_reports(report = "assemble", params = list(import_data = TRUE))
>>> Compiling report: assemble_data
      - with parameters: import_data = TRUE
All done!

Warning message:
In yaml::yaml.load(input_lines[(delimiters[1] + 1):(delimiters[2] -  :
  Evaluating R expressions (!expr) will soon require explicit `eval.expr` option (see yaml.load help)
> 

[TimTaylor]

Can you share the yaml header from the report?