Bug #7608


Document ERB::new trim_mode parameter

Added by wonderingtomato (Tom Pave) over 9 years ago. Updated over 9 years ago.

Target version:
ruby -v:
MRI 1.9.3-p327


I believe the documentation for the ((ERB::new|URL: method could be improved. Specifically, the list of available arguments for the (({trim_mode})) paramenter doesn't seem complete. I found you can use the option (({"-"})) to make the tags (({<% -%>})) work. (by the way... It looks like those tags aren't documented either).

Without that option the (({<% -%>})) tags don't work properly. I made several tests and can confirm the issue affects both Ruby 1.8.7 and 1.9.3.
I've attached a short file (70 lines including whitespace) to reproduce the problem. Comments indicate what goes wrong, and I have provided a commented out line that works instead (as it uses the undocumented (({trim_mode="-"})) option).

I came across the issue while working on a plain ruby script, but I used the same code in a Rails app with no problems at all, so I guess that ERB text is parsed in Rails with (({trim_mode="-"})) by default.


QRCoder.rb (1.33 KB) QRCoder.rb wonderingtomato (Tom Pave), 12/23/2012 01:40 PM

Updated by zzak (Zachary Scott) over 9 years ago

  • Subject changed from Documentation, Std-lib, ERB to Document ERB::new trim_mode parameter
  • Assignee set to zzak (Zachary Scott)
  • Target version changed from 3.0 to 2.0.0
Actions #2

Updated by zzak (Zachary Scott) over 9 years ago

  • Status changed from Open to Closed
  • % Done changed from 0 to 100

This issue was solved with changeset r38572.
Tom, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.


Also available in: Atom PDF