fix typo

Author: coke

doc/Language/tables.pod6

@@ -25,7 +25,7 @@ characters (e.g., V<'  '>)]. Column separators are not normally recognized
 as such at the left or right side of a table, but one on the right side may
 result in one or more empty cells depending upon the number of the cells in
 other rows. (Note that currently a pipe or plus character meant as part of cell
-data will result in an unintentended extra column.)
+data will result in an unintended extra column.)
 
 2. Mixing visible and invisible column separators in the same table is
 illegal.