[perl #121666] [PATCH] Fix RT #43692: Math::BigFloat -> blog() is sometimes incorrect

# New Ticket Created by  (Peter J. Acklam) 
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Fix RT #43692: Math::BigFloat -> blog() is sometimes incorrect

dist/Math-BigInt/lib/Math/BigFloat.pm: Patched as suggested in RT #43692.
blog(x) would sometimes return blog(2*x) when the accuracy was greater than
70 digits.

t/biglog.t: Fixed incorrect use of ok(). Edited a test case so it fails without
this patch.

• [perl #121666] [PATCH] Fix RT #43692: Math::BigFloat -> blog() is sometimes incorrect by Tony Cook via RT
• [perl #121666] [PATCH] Fix RT #43692: Math::BigFloat -> blog() is sometimes incorrect by perlbug-followup