The Stacks project

Fix typo in stacks

Thanks to  Olivier de Gaay Fortman
https://stacks.math.columbia.edu/tag/036X#comment-4874

Spell check: words starting with h, i, j, k, l, m, H, I, J, K, L, and M

LaTeX: Remove useless brackets

Relative inertia stacks

Algebraic stacks: Deligne-Mumford with trivial inertia is a space

	To prove this for a general algebraic stack we will first prove
	a characterization of a DM stack as an algebraic stack whose
	inertia is formally unramified, or equivalently diagonal is
	formally unramified. Before we do this it makes sense to change
	the notion of unramified as suggested by David Rydh (see
	documentation/todo-list).

	We also added the proof of the statement that the property of
	being an algebraic stack is invariant under equivalences.

Added new tags

	modified:   tags/tags

Stacks: Introduction of Inertia Stack

	Thanks to Thanos Papaioannou

	modified:   stacks.tex