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Keep ESC control characters in the message body #1680

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Keep ESC control characters in the message body #1680

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7 changes: 4 additions & 3 deletions alot/helper.py
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Original file line number Diff line number Diff line change
Expand Up @@ -44,10 +44,11 @@ def split_commandstring(cmdstring):
def unicode_printable(c):
"""
Checks if the given character is a printable Unicode character, i.e., not a
private/unassigned character and not a control character other than tab or
newline.
private/unassigned character and not a control character other than tab,
newline or ESC (for ANSI escape sequences, e.g. HTML coloring).
"""
if c in ('\n', '\t'):
ESC = '\x1b'
if c in ('\n', '\t', ESC):
return True
return unicodedata.category(c) not in ('Cc', 'Cn', 'Co')

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