fix(tofs): update comments in files_switch macro for new method

Author: myii

template/macros.jinja

@@ -7,24 +7,26 @@
     Files Switch (TOFS) pattern.
 
     Params:
-      * prefix: pillar prefix to custom ':files_switch'. Colons ':'
-        are replaced by '/' to be used as directory prefix (<path_prefix>)
       * files: ordered list of files to look for
       * default_files_switch: if there's no pillar
-        '<prefix>:files_switch' this is the ordered list of grains to
+        '<tplroot>:tofs:files_switch' this is the ordered list of grains to
         use as selector switch of the directories under
         "<path_prefix>/files"
       * indent_witdh: indentation of the result value to conform to YAML
 
-    Example:
+    Example (based on a `tplroot` of `xxx`):
 
     If we have a state:
 
       Deploy configuration:
         file.managed:
           - name: /etc/yyy/zzz.conf
-          - source: {{ files_switch('xxx', ['/etc/yyy/zzz.conf',
-                                            '/etc/yyy/zzz.conf.jinja']) }}
+          - source: {{ files_switch(
+                          salt['config.get'](
+                              tplroot ~ ':tofs:files:Deploy configuration',
+                              ['/etc/yyy/zzz.conf', '/etc/yyy/zzz.conf.jinja']
+                          )
+                    ) }}
           - template: jinja
 
     In a minion with id=theminion and os_family=RedHat, it's going to be