escape echo
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@ -14,7 +14,7 @@ class D2langDirective(Directive):
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srcdir = self.state.document.settings.env.srcdir
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diag_source = self.content
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d2_bin = which('d2')
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cmd_line = "echo %s | %s - %s" % (diag_source, d2_bin, srcdir + "/test.svg")
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cmd_line = 'echo "%s" | %s - %s' % (diag_source, d2_bin, srcdir + "/test.svg")
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args = shlex.split(cmd_line)
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subprocess.run(args)
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image_node = nodes.image(uri="/test.svg")
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