* fix(tools): grep stops where a file's line breaks stop
scanGrepFile treated EOF after a trailing line break - and an empty file -
as the START of another line, and handed the matcher an empty line one
number past the real content. Every pattern that matches an empty string
then reported a match on a line no reader sees:
a.txt holds "x\n"; grep pattern "^$"
-> a.txt:2: (grep -c '' GNU-style reports no such line)
same file, pattern ".*", count mode
-> "2 matches found" (one real line, one phantom)
an empty file, pattern "^$"
-> a.txt:1: (the file has no lines at all)
read_file and the file tracker's countLines already state the rule the
scan violated: "the trailing newline does not open a line", and an empty
file has no lines. The scan now stops there too, so anchored and
empty-matching patterns can only match the lines the content carries.
Real matches, numbering, count-per-hit accounting for non-empty patterns,
file mode, glob and symlink handling are unchanged.
* test(tools): make the grep line-number parity test catch the phantom
The parity test matched only "needle", a pattern that cannot match the
empty line the old EOF branch invented, so its absence-of-line-4
assertion passed on the code being fixed. The pattern now also matches an
empty line, and the expected output is asserted exactly: on the pre-fix
scanner the same run reported
grep = "a.txt:2: needle two\na.txt:4: ",
want exactly the line read_file numbers 2
so the phantom is visible right beside the real line, and the test is
about the numbering claim it states. Also gofmt-aligns the case table
that made the CI formatting check fail.
Felix-Ayush
aa9ba8412e