Trim trailing whitespace breaks explicit Markdown newlines in playground markup comments

Number:rdar://41104623 Date Originated:13-Jun-2018 04:36 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Version 9.4 (9F1027a)
Classification:UI/Usability Reproducible:Always
Markdown supports forcing a newline between lines in a paragraph by ending a line with two spaces. That way:

Line 1  
Line 2  
Line 3

gets rendered as:

Line 1
Line 2
Line 3

instead of:

Line 1Line 2Line 3

If the “Automatically trim trailing whitespace” option in Xcode’s Text Editing preferences is enabled, Xcode will strip trailing whitespace on a line and break this feature of Markdown.

It seems sane to add an exception so that even if the “Automatically trim trailing whitespace” option is on, spaces at the end of lines in a playground markup comment are left as-is. (Not sure if it makes sense for regular comments in arbitrary source code files.)

Steps to Reproduce:

Expected Results:

Actual Results:

Version 9.4 (9F1027a)



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