escape the italics bold and monospace examples

since this is meant to be read in rendered form, and there are examples of these scattered through the text otherwise
MAINT: use a structure as cache buckets
Merge pull request #5014 from juliantaylor/cache-struct

MAINT: use a structure as cache buckets
Merge pull request #5003 from endolith/patch-1

escape the italics bold and monospace examples