albertito / spf / 32081052939

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macro: Reject invalid and non-terminated macros

Currently in the macro parsing we accept (and ignore) invalid macro
characters, and also accept non-terminated macros.

To fix both bugs, and make the parser more standards-compliant, this
patch makes the code more strict in those checks.

In addition to the pre-existing tests, the regexp was cross-checked
against RFC 7208, to make sure we are not going to accidentally reject a
valid macro.

4 of 4 new or added lines in 1 file covered. (100.0%)

665 of 666 relevant lines covered (99.85%)

3151.84 hits per line