Issue #19485 has been updated by Eregon (Benoit Daloze). Another condition could be only accept tabs in squiggly heredoc if they prefix all lines of the squiggly heredoc? (otherwise SyntaxError, including for the 2 cases in the description) (I wish tabs would just not be accepted as indentation for Ruby, but well that's probably a pointless discussion, even though it seems 99% of the community agrees there) ---------------------------------------- Bug #19485: Unexpected behavior in squiggly heredocs https://bugs.ruby-lang.org/issues/19485#change-102417 * Author: jemmai (Jemma Issroff) * Status: Assigned * Priority: Normal * Assignee: core * ruby -v: 3.2.1 * Backport: 2.7: UNKNOWN, 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED ---------------------------------------- Based on [the squiggly heredoc documentation](https://ruby-doc.org/3.2.1/syntax/literals_rdoc.html), I found the following to be unexpected behavior. Explicitly, the documentation specifies, "The indentation of the least-indented line will be removed from each line of the content." After running: ```ruby File.write("test.rb", "p <<~EOF\n\ta\n b\nEOF\n") ``` and then `ruby test.rb`, I get the following output: ``` "\ta\nb\n" ``` The least-indented line above is ` b`, however, no leading whitespace is removed from the line containing `\ta`. For another example: ```ruby File.write("test.rb", "p <<~EOF\n\tA\n \tB\nEOF\n") ``` `ruby test.rb` gives: ``` "A\nB\n" ``` In this case, the `\t` was removed from the line containing `A`, but more whitespace than that (` \t`) was removed from the line containing `B`. After seeing the first example, I assumed that the documentation was out of date, and that I should fix it to read that `\t` would never be converted into space characters in order to remove leading whitespace. But after the second example, it seems like this is a bug in removing leading whitespace. Can someone please explain what the rules should be on squiggly heredocs? I can implement a fix to adhere to the rules, or can update the documentation, I am just unsure of what the rules should be because the above two examples reflect unexpected behavior in two distinct ways. -- https://bugs.ruby-lang.org/