h: search-pattern
1. A pattern is one or more branches separated by the "\ |" symbol. It corresponds to all that corresponds to one of the branches.
Example: foo\|beep matches "foo" and matches "beep". If there are several branches, the first is used.
2. A branch is one or more concat, separated by \& . It matches the last concat, but only if all previous concats also match in the same position.
Examples:
foobeep\&... matches "foo" in "foobeep".
.*Peter\&.*Bob matches a string containing both "Peter" and "Bob"
Mario G.
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