add a paragraph of text into an rdocx object
body_add_par(x, value, style = NULL, pos = "after")Other functions for adding content:
body_add_blocks(),
body_add_break(),
body_add_caption(),
body_add_docx(),
body_add_fpar(),
body_add_gg(),
body_add_img(),
body_add_plot(),
body_add_table(),
body_add_toc()