Tue, 02 May 2017 11:05:04 +0200 wenzelm more general pattern;
Tue, 02 May 2017 10:47:39 +0200 wenzelm more timing;
Tue, 02 May 2017 10:25:27 +0200 wenzelm proper quote (amending 546020a98a91): e.g. relevant for "ISABELLE_BUILD_OPTIONS";
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