Fix printing decimal-point character on printf %#a #1296
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The C standard indicates that when processing the a conversion specifier "if the precision is zero *and* the # flag is not specified, no decimal- point character appears.". This means that __fmt needs to ensure that it prints the decimal-point character not only when the precision is non-0, but also when the # flag is specified - cosmopolitan currently does not. This patch fixes this, along with adding a few tests for this behaviour.
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The C standard indicates that when processing the a conversion specifier
"if the precision is zero and the # flag is not specified, no decimal-
point character appears.". This means that __fmt needs to ensure that it
prints the decimal-point character not only when the precision is non-0,
but also when the # flag is specified - cosmopolitan currently does not.
This patch fixes this, along with adding a few tests for this behaviour.