lib/history: remove redundant export for HISTIGNORE #501
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There does not seem to be a specific reason that we export HISTIGNORE as mentioned in #500 (comment). These lines were introduced in commit 53fb803 but only HISTIGNORE had
export
.In this PR, I try to remove the redundant
export
from the definition ofHISTIGNORE
. I'll wait for a while. If anyone has a reason to export HISTIGNORE, please let me know in this PR.