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    <p>No, <code>\r</code> (carriage return, or <code>CR</code>) is only correct for <em>old</em> Mac OS, so up to release 9.</p> <p>OS X is a complete rewrite, and now a UNIX-based OS. It uses <code>\n</code> (line feed, or <code>LF</code>).</p> <p>From <a href="http://en.wikipedia.org/wiki/Newline#Representations" rel="nofollow noreferrer">Wikipedia on the subject of Newline</a>:</p> <blockquote> <ul> <li><code>LF</code>: Multics, Unix and Unix-like systems (GNU/Linux, Mac OS X, FreeBSD, AIX, Xenix, etc.), BeOS, Amiga, RISC OS and others.</li> </ul> <p>[...]</p> <ul> <li><code>CR</code>: Commodore 8-bit machines, Acorn BBC, ZX Spectrum, TRS-80, Apple II family, Mac OS up to version 9 and OS-9</li> </ul> </blockquote> <p>See <a href="https://stackoverflow.com/questions/419291/historical-reason-behind-different-line-ending-at-different-platforms">Historical reason behind different line ending at different platforms</a> for some history behind this.</p> <p>Instead, it's Scintilla that is in the wrong here. The <a href="http://www.scintilla.org/ScintillaDoc.html#LineEndings" rel="nofollow noreferrer">Line endings documenation</a> suggests it defaults to <code>\r</code> when on Mac:</p> <blockquote> <p>Scintilla can interpret any of the Macintosh (<code>\r</code>), Unix (<code>\n</code>) and Windows (<code>\r\n</code>) line ends.</p> </blockquote> <p>You can use the <a href="http://www.scintilla.org/ScintillaDoc.html#SCI_SETEOLMODE" rel="nofollow noreferrer"><code>SCI_SETEOLMODE()</code> function</a> to alter that behaviour, whatever the Python binding equivalent is should be passed the <code>os.linesep</code> value to make Scintilla use the correct line separator for your platform.</p> <p>I see that there is a <a href="http://pyqt.sourceforge.net/Docs/QScintilla2/classQsciScintilla.html#a0f2353468d2c37abe9c933d4ac0478ad" rel="nofollow noreferrer"><code>QsciScintilla.setEolMode()</code> method</a> and a <a href="http://pyqt.sourceforge.net/Docs/QScintilla2/classQsciScintilla.html#ab4b6b4286a74e173a86de0a7f55241d5" rel="nofollow noreferrer"><code>EOLMode</code> enum</a> to accomplish that; I guess you'll need to map python line ending variants to the enum and pass the right enum value to the <code>.setEolMode()</code> method.</p>
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    1. POPython: incorrect os.linesep on OS X
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    1. USMartijn Pieters
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    1. POPython: incorrect os.linesep on OS X
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    1. COAlright, that makes sense. Why would Qscintilla then still return the text with a \r as the newline character?
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      1. USDaniel Schreij
    2. CO@DanielS: Perhaps that's a bug in Qscintilla?
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      1. USMartijn Pieters
    3. CO@DanielS: Ah, Scintilla is rather dated; the [documentation I found](http://www.scintilla.org/ScintillaDoc.html#LineEndings) indeed suggests `\r` is used regardless of Mac OS version. Setting `SCI_SETEOLMODE` to `os.linesep` seems to be a good work-around.
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