Move the date-last-month-year to a function.
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					@ -44,7 +44,7 @@ restic-b2 check
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* Monthly music library backup:
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					* Monthly music library backup:
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```zsh
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					```zsh
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restic-b2 backup --tag "$(date -d "$(date +'%Y-%m-01') -1 day" +'%B %Y')" ~/Beets
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					restic-b2 backup --tag "$(date-last-month-year)" ~/Beets
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```
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					```
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* KeePassXC database:
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					* KeePassXC database:
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					@ -1,3 +1,12 @@
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					# Returns the previous month as "Month Year" (ie. "April 2023").
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					# date-last-month-year
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					date-last-month-year () {
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					  # The inner date "+'%Y-%m-01'" gets the date of the current month with 01 as the day.
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					  # Then that date has 1 day subtracted (date -d ... -1 day).
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					  # And finally "+'%B %Y'" gets the resulting date as the month and year.
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					  date -d "$(date +'%Y-%m-01') -1 day" +'%B %Y'
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					}
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# Copies a section from a video using ffmpeg.
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					# Copies a section from a video using ffmpeg.
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# extract-clip <input file> <start timestamp> <end timestamp> <output file>
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					# extract-clip <input file> <start timestamp> <end timestamp> <output file>
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extract-clip () {
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					extract-clip () {
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