Failed to print weather path in ParametricJob objects

[hongyuanjia]

library(eplusr)

# get EnergyPlus v9.1 installation directory
dir <- eplus_config(9.1)$dir

# use example model and weather file distributed with EnergyPlus v9.1
path_model <- file.path(dir, "ExampleFiles/RefBldgMediumOfficeNew2004_Chicago.idf")
path_weather <- file.path(dir, "WeatherData/USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.epw")

param_job(path_model, path_weather)
#> IDD v9.1.0 has not been parsed before.
#> Try to locate `Energy+.idd` in EnergyPlus v9.1.0 installation folder '/usr/local/EnergyPlus-9-1-0'.
#> IDD file found: '/home/hongyuanjia/.local/EnergyPlus-9-1-0/Energy+.idd'.
#> Start parsing...
#> Parsing completed.
#> ── EnergPlus Parametric Simulation Job ─────────────────────────────────────────
#> * Seed: '/home/hongyuanjia/.local/EnergyPlus-9-1-0/ExampleFiles/RefBldgMedi...
#> * Weather: << Not specified >>
#> * EnergyPlus Version: '9.1.0'
#> * EnergyPlus Path: '/home/hongyuanjia/.local/EnergyPlus-9-1-0'
#> << No measure has been applied >>

^{Created on 2020-06-07 by the reprex package (v0.3.0)}

[hongyuanjia]

Closes via #260