Wanna replace in string
Repladce backslash with A
Repladce colon with X
puts ' \\ : '
# \ :
# Only backslash replace
# It works
puts ' \\ : '.tr('\\', 'A')
# A :
# Replace backslash and other calacter one time
# It does not work
puts ' \\ : '.tr('\\:', 'AX')
# \ A
# Above case maybe same as this
# Only colon replacing
puts ' \\ : '.tr(':', 'AX')
# \ A
# Use expression triple backslash as backslash
# It works
puts ' \\ : '.tr('\\\:', 'AX')
# A X
# It works
# backslash at last character in tr arg
puts ' \\ : '.tr(':\\', 'XA')
# A X
Original by Github issue
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