Updated User Guide: Somewhat improved wording

web/content/docs/userguide/basics/cli-arguments/index.md

web/content/docs/userguide/basics/container/index.md

web/content/docs/userguide/basics/conventions/index.md

web/content/docs/userguide/basics/introduction/index.md

web/content/docs/userguide/basics/jupyter-notebooks/index.md

web/content/docs/userguide/basics/project-file/index.md

web/content/docs/userguide/basics/project_file_intro.md

web/content/docs/userguide/basics/quadrature.md

...ntent/docs/userguide/basics/working_with_project_files.md

web/content/docs/userguide/blocks/boundary_conditions.md

web/content/docs/userguide/blocks/curves.md

web/content/docs/userguide/blocks/intro.md

web/content/docs/userguide/blocks/linear_solvers.md

web/content/docs/userguide/blocks/media.md

web/content/docs/userguide/blocks/meshes.md

...tent/docs/userguide/blocks/misc/constitutive_relations.md

...content/docs/userguide/blocks/misc/scaling_source_term.md

web/content/docs/userguide/blocks/nonlinear_solvers.md

web/content/docs/userguide/blocks/parameters.md

web/content/docs/userguide/blocks/process_variables.md