Try to find out which word is hidden in this riddle:
A flat and sharp item
occurring inadvertently
and sometimes in a twin pack
it's altering what will come
and can be naturally erased.
I'd say the word is...
Reasoning:
A flat and sharp item
occurring inadvertently
Inadvertent being a synonym of accidental.
and sometimes in a twin pack
There are double accidentals.
it's altering what will come
They raise or lower the pitch of the next note.
and can be naturally erased.
A natural is an accidental that cancels previous accidentals.
the inadvertent thing is
spell check marker
A flat and sharp item
shows as a relatively flat and pointy zigzag in most word processors
occurring inadvertently
only appears when you make a mistake
and sometimes in a twin pack
mistakes in both spelling (red) and grammar (green) can appear at the same time
it's altering what will come
an edit to the text will surely follow when this marker appears...
and can be naturally erased.
... after which the marker will automatically disappear