[fix] update pillar example per comments

[noelmcloughlin]

Describe the solution you'd like

See comments in #30

[noelmcloughlin]

One thing I noticed that I didn't get time to resolve is the missing tofs block in pillar.example. Something like:

tofs:
# The files_switch key serves as a selector for alternative
# directories under the formula files directory. See TOFS pattern
# doc for more info.
# Note: Any value not evaluated by config.get will be used literally.
# This can be used to set custom paths, as many levels deep as required.
# files_switch:
# - any/path/can/be/used/here
# - id
# - roles
# - osfinger
# - os
# - os_family
# All aspects of path/file resolution are customisable using the options below.
# This is unnecessary in most cases; there are sensible defaults.
# Default path: salt://< path_prefix >/< dirs.files >/< dirs.default >
# I.e.: salt://template/files/default
# path_prefix: template_alt
# dirs:
# files: files_alt
# default: default_alt
# The entries under source_files are prepended to the default source files
# given for the state
source_files:
template-config-file-file-managed:
- 'example_alt.tmpl'
- 'example_alt.tmpl.jinja'
The source_files would need to be updated for all uses of files_switch throughout this formula.