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Add doc about extracting timestamps with no spaces

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Timestamp formats may have no space between date and time components and cause the script to fail.
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Greg Bodnar 2019-08-04 15:23:33 +12:00 • committed by GitHub
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docs/recipes.md
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@ -96,7 +96,10 @@ log_question 'What did I make progress with?'
### Display random entry
You can use this to select one title at random and then display the whole
entry.
entry. The invocation of `cut` needs to match the format of the timestamp.
For timestamps that have a space between data and time components, select
fields 1 and 2 as shown. For timestamps that have no whitespace, select
only field 1.
``` sh
jrnl -on "$(jrnl --short | shuf -n 1 | cut -d' ' -f1,2)"