e parsing should read exactly one digit

[Acumane]

Describe the bug
.format('eHHmm') returns an expected time string that moment validates as incorrect.

To Reproduce
Steps to reproduce the behavior:

1. Moment.tz('America/New_York').format('eHHmm') produces, say, 21530
2. But Moment('21530', 'eHHmm').isValid() returns false

Expected behavior
These two results should be (at least intuitively) consistent

Desktop (please complete the following information):

• OS: Windows 11 WSL2
• Browser: Chromium
• Version: 112.0.5615.49 (Official Build) (64-bit)

Moment-specific environment

• Vite 4.2.1 w/ Vue 3.2.47 running Node v18.12.1
• Currently running on EDT

Please run the following code in your environment and include the output:

Tue Apr 11 2023 02:55:49 GMT-0400 (Eastern Daylight Time)
4/11/2023, 2:55:49 AM
240
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36
2.29.4

Additional context
Moment('2-1530', 'e-HHmm') with any separator is, however, valid.

[ichernev]

Yeah, e reads any number of digits instead of exactly one. You can submit a PR.