Issue #19485 has been updated by sawa (Tsuyoshi Sawada). nobu (Nobuyoshi Nakada) wrote in #note-2:
My [draft] is:
Note that the "indentation" is counted like as each horizontal tabs are expanded to spaces up to the next tab stop column (per 8 columns), and each indentation to be removed is the longest tabs and spaces sequence where the next column does not exceed the least-indentation.
I find the sentence too long and a little too difficult to parse/understand. What about something like this:
For the purpose of measuring indentation, a horizontal tab is regarded as a sequence of one to eight spaces such that the column position corresponding to the end of the horizontal tab is a multiple of eight. The amount to be removed is counted in terms of number of spaces. If the boundary appears in the middle of a tab character, that tab character is removed.
---------------------------------------- Bug #19485: Unexpected behavior in squiggly heredocs https://bugs.ruby-lang.org/issues/19485#change-102406 * 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 After seeing the first example, I assumed that the documentation was out of date, and that I should fix it to read that `\t` would never be converted into space characters in order to remove leading whitespace.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/