Add +capitalize+ option to Inflector.humanize

[claudiob]

So strings can be humanized without being capitalized:

'employee_salary'.humanize                    # => "Employee salary"
'employee_salary'.humanize(capitalize: false) # => "employee salary"

[claudiob]

@fxn As discussed in https://groups.google.com/forum/#!topic/rubyonrails-core/ADr7xBCBKpE 😬

[chancancode]

The default behaviour should probably be mentioned here, maybe:

"Turns underscores into spaces, and strips a trailing '_id' if present. Also capitalizes the first word by default."

then later...

"The capitalization behaviour can be changed by ..."

Probably not the best possible way to say this, but my point is that it seems easier to read if we point out the default upfront (since that's how most people will use this) and point out what can be changed (+how) later.

[fxn]

Also, the patch needs to update the AS guide.

[claudiob]

@fxn Thanks for the feedback… will be back soon with a new commit

[claudiob]

@fxn I think I've applied all your suggested changes… tell me if I missed anything! 🍭

[fxn]

Looking good, thanks!