Remove lexing for colon-matching use cases

[charliermarsh]

It's much simpler to just search ahead for the first colon.

[github-actions]

PR Check Results

Ecosystem

✅ ecosystem check detected no changes.

Benchmark

Linux

group                                      main                                   pr
-----                                      ----                                   --
formatter/large/dataset.py                 1.01      3.4±0.01ms    11.9 MB/sec    1.00      3.4±0.01ms    12.0 MB/sec
formatter/numpy/ctypeslib.py               1.00    713.5±2.19µs    23.3 MB/sec    1.00    716.7±2.32µs    23.2 MB/sec
formatter/numpy/globals.py                 1.00     74.8±0.28µs    39.4 MB/sec    1.04     77.9±4.33µs    37.9 MB/sec
formatter/pydantic/types.py                1.00  1398.8±22.71µs    18.2 MB/sec    1.00  1396.1±27.67µs    18.3 MB/sec
linter/all-rules/large/dataset.py          1.01     10.3±0.05ms     3.9 MB/sec    1.00     10.2±0.04ms     4.0 MB/sec
linter/all-rules/numpy/ctypeslib.py        1.01      2.8±0.00ms     6.0 MB/sec    1.00      2.8±0.02ms     6.0 MB/sec
linter/all-rules/numpy/globals.py          1.00    390.4±0.94µs     7.6 MB/sec    1.00    389.2±0.87µs     7.6 MB/sec
linter/all-rules/pydantic/types.py         1.02      5.4±0.02ms     4.7 MB/sec    1.00      5.3±0.02ms     4.8 MB/sec
linter/default-rules/large/dataset.py      1.01      5.5±0.02ms     7.4 MB/sec    1.00      5.5±0.01ms     7.5 MB/sec
linter/default-rules/numpy/ctypeslib.py    1.01   1227.4±1.80µs    13.6 MB/sec    1.00   1217.1±2.25µs    13.7 MB/sec
linter/default-rules/numpy/globals.py      1.01    141.8±0.26µs    20.8 MB/sec    1.00    140.9±2.24µs    20.9 MB/sec
linter/default-rules/pydantic/types.py     1.01      2.5±0.01ms    10.2 MB/sec    1.00      2.5±0.00ms    10.3 MB/sec

Windows

group                                      main                                   pr
-----                                      ----                                   --
formatter/large/dataset.py                 1.00      3.7±0.05ms    11.0 MB/sec    1.02      3.8±0.06ms    10.8 MB/sec
formatter/numpy/ctypeslib.py               1.00   759.4±11.58µs    21.9 MB/sec    1.02   771.2±13.29µs    21.6 MB/sec
formatter/numpy/globals.py                 1.00     78.3±1.90µs    37.7 MB/sec    1.02     80.2±2.22µs    36.8 MB/sec
formatter/pydantic/types.py                1.00  1534.2±25.34µs    16.6 MB/sec    1.02  1572.1±84.49µs    16.2 MB/sec
linter/all-rules/large/dataset.py          1.01     13.1±0.19ms     3.1 MB/sec    1.00     13.0±0.20ms     3.1 MB/sec
linter/all-rules/numpy/ctypeslib.py        1.01      3.6±0.12ms     4.6 MB/sec    1.00      3.5±0.06ms     4.7 MB/sec
linter/all-rules/numpy/globals.py          1.00   436.7±13.15µs     6.8 MB/sec    1.00    434.6±8.77µs     6.8 MB/sec
linter/all-rules/pydantic/types.py         1.00      6.9±0.18ms     3.7 MB/sec    1.00      6.8±0.14ms     3.7 MB/sec
linter/default-rules/large/dataset.py      1.00      7.2±0.10ms     5.7 MB/sec    1.00      7.2±0.09ms     5.6 MB/sec
linter/default-rules/numpy/ctypeslib.py    1.01  1540.7±22.04µs    10.8 MB/sec    1.00  1532.1±24.36µs    10.9 MB/sec
linter/default-rules/numpy/globals.py      1.00    176.5±2.92µs    16.7 MB/sec    1.00    177.2±6.64µs    16.7 MB/sec
linter/default-rules/pydantic/types.py     1.00      3.2±0.04ms     7.9 MB/sec    1.02      3.3±0.07ms     7.8 MB/sec