typo fix for reapi pod

diff --git a/pod/perlreapi.pod b/pod/perlreapi.pod
index eaaa179..3d0962a 100644 (file)
--- a/pod/perlreapi.pod
+++ b/pod/perlreapi.pod
@@ -226,7 +226,7 @@ faster than C<unpack>.
 =item RXf_NO_INPLACE_SUBST
 
 Added in perl 5.18.0, this flag indicates that a regular expression might
-perform an operation that would interfere with inplace substituion. For
+perform an operation that would interfere with inplace substitution. For
 instance it might contain lookbehind, or assign to non-magical variables
 (such as $REGMARK and $REGERROR) during matching.  C<s///> will skip
 certain optimisations when this is set.