git-merge-tree.txt: replace spurious HTML entity

Signed-off-by: Andreas Schwab <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: andreas-schwab

Documentation/git-merge-tree.txt

@@ -103,7 +103,7 @@ This is an integer status followed by a NUL character.  The integer status is:
 
      0: merge had conflicts
      1: merge was clean
-     <0: something prevented the merge from running (e.g. access to repository
+     <0: something prevented the merge from running (e.g. access to repository
 	 objects denied by filesystem)
 
 [[OIDTLT]]