Fix/19080 macro name highlight

[usefahmed07]

Closes #19080

[github-actions]

DMD perf check

Metric	Base	PR	Δ
dmd binary size (stripped)	6.86 MB	6.87 MB	+0.17%

All measurements

Metric	Base	PR	Δ
compile hello.d (instr)	214.9 M	214.9 M	-0.003%
compile hello.d -O -release (instr)	233.2 M	233.2 M	-0.003%
compile Phobos (instr)	5,121.5 M	5,121.7 M	+0.003%
compile Phobos codegen (instr)	1,471.9 M	1,472.2 M	+0.025%
compile vibe.d (instr)	15,127.4 M	15,124.7 M	-0.018%
dmd binary size (stripped)	6.86 MB	6.87 MB	+0.17%
hello binary size (stripped)	0.72 MB	0.72 MB	0.00%
peak RSS (compile hello.d)	43.51 MB	43.52 MB	+0.03%
peak RSS (compile Phobos)	619.1 MB	618.8 MB	-0.06%
peak RSS (compile vibe.d)	1918 MB	1917 MB	-0.05%
compile dmd itself (wall)	10.0 s	10.0 s	+0.04%
compile hello.d (wall)	52.2 ms	52.4 ms	+0.31%
compile Phobos (wall)	1,171 ms	1,166 ms	-0.43%

_{7a2e468 vs merge-base 4264da7 · about these metrics}