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-rw-r--r--docs/opt-coercion/prooftree.sty2
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/opt-coercion/prooftree.sty b/docs/opt-coercion/prooftree.sty
index abb7d44864..b5e6076531 100644
--- a/docs/opt-coercion/prooftree.sty
+++ b/docs/opt-coercion/prooftree.sty
@@ -339,7 +339,7 @@ $\displaystyle
% IDEAS
% 1. Specification of \shiftright and how to spread trees.
% 2. Spacing command \m which causes 1em+1fil spacing, over-riding
-% exisiting space on sides of trees and not affecting the
+% existing space on sides of trees and not affecting the
% detection of being on the left or right.
% 3. Hack using \@currenvir to detect LaTeX environment; have to
% use \aftergroup to pass \shortenproofleft/right out.