hg: code-tools/jtreg: Update tag spec for __ERROR__ in extraPropDens

[jonathan.gibbons at oracle.com]

Changeset: e7189cf26192
Author:    jjg
Date:      2018-10-04 12:03 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/e7189cf26192

Update tag spec for __ERROR__ in extraPropDens

! src/share/doc/javatest/regtest/tag-spec.html