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Rule "a heads-up"

This is one of many errors that LanguageTool can detect.

Description: a heads-up
Message: The informal warning/alert <suggestion>\3-\4</suggestion> is spelled with a hyphen and no apostrophe.
Category: Grammar (ID: GRAMMAR)
Link: https://languagetool.org/insights/post/hyphen/
Incorrect sentences
that this rule can detect:
  • Thanks for your heads up.
    Correction suggestion: heads-up
ID: A_HEADS_UP [3]
Version: 6.6-SNAPSHOT (2024-11-21 22:33:10 +0100)