@uref{http://lilypond.org/test/}
@end example
-The test comparison shows all of the changes that occured between
+The test comparison shows all of the changes that occurred between
the current release and the prior release. Each test that has
a significant difference in output is displayed, with the old
version on the left and the new version on the right. Blurs
@section Identifying code regressions
Before modified code is committed to master, a regression test
-comparision must be completed to ensure that the changes have
+comparison must be completed to ensure that the changes have
not caused problems with previously working code. The comparison
is made automatically upon compiling the regression test suite
twice.