pipbot: Match multiple digit version numbers

When a version digit reached double digits:

    m4_define([pipdb_micro_version],[10])

... the pipbot version matching regexp was only matching the last (0)
digit. This was because the '.*' component which preceded the digit
component was greedily swallowing the preceding digits. This commit
fixes this by anchoring the regexp match around the preceding ',' in the
line.
plan: Fix single non-ASCII single quotes
plan: Individually identify each required skill
plan: Don't indent paragraph after list