toTitle function fails to understand word boundaries and unicode punctuation

[thevilledev]

Consul Template version

consul-template v0.29.6 (e4f5d583)

Expected behavior

Consider the following template:

{{ "this isn't ok" | toTitle }}
{{ "foo\u2026bar" | toTitle }}

Expected output:

This Isn't Ok
Foo…Bar

Actual behavior

Template above yields the following:

This Isn'T Ok
Foo…bar

Title casing currently fails to understand word boundaries properly, leading to various issues with hyphenation and unicode punctuation.

References

Current implementation of toTitle function is based on strings.Title, which has been deprecated since Go 1.18. Instead, golang.org/x/text/cases should be used:

• strings, bytes: deprecate Title golang/go#48367