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make: in the debug log, always qualify line number with filename Previously, to find out the filename corresponding to a line number from a 'Parsing' line, it was necessary to find the preceding 'SetFilenameVars' line, which was unnecessarily time-consuming and distracting. The 'filename:line' format matches the one used in PrintStackTrace, and it differs from the one used in PrintLocation, as the former format is more common in other tools. Most of the affected unit tests only use the 'Parsing' lines to give additional context to their debug log, so no structural changes there.
make: use fewer technical terms in debug message for dependency
make: make debug logging a bit more human-friendly The previous log format "ParseReadLine (%d): '%s'" focused on the implementation, it was not immediately obvious to a casual reader that the number in parentheses was the line number. Additionally, having both a colon and quotes in a log message is uncommon. The quotes have been added in parse.c 1.127 from 2007-01-01. The new log format "Parsing line %d: %s" is meant to be easier readable by humans. The quotes are not needed since ParseReadLine always strips trailing whitespace, leaving no room for ambiguities. The other log messages follow common punctuation rules, which makes the beginning of the line equally unambiguous. Before var.c 1.911 from 2021-04-05, variable assignments were logged with the format "%s:%s = %s", without a space after the colon.
make: remove filler word 'Do' from function names for parsing No functional change, except for debug logging.
make: remove overengineered Enum_ValueToString For printing the status of a GNode, there was already made_name (now renamed to GNodeMade_Name), which prints user-friendly text instead of the bare enum constant names. To do this change confidently, I first had to demonstrate that the output really affects something other than just the word "UNMADE". There had not been a test for that case before, and the test immediately discovered a bug in the -dg2 and -dg3 options. This bug is one of the oldest in make, dating back to at least 1993.
make(1): add more debugging for searching transformation rules
make(1): add more debug logging for suffixes The "Removing suffix" is not covered by the current tests. It would be best if that code were unreachable at all, since a reference count of -1 doesn't make sense.
make(1): add test for incomplete transformation rule