Allow Hashtags in Timeline Titles, Sections, and Events

[FutzMonitor]

:bookmark_tabs: Summary

This pull request removes the hashtag from the title, section, and event regex so that hashtags can be used in their text content. The period element were not included because of an inconsistency. Whereas you can put a hashtag anywhere in the string for a title, section, and event, the period element begins a line and thus is counted as comment.

These changes were made to allow for hashtags in the timeline diagram and to address the inconsistency between percent comments and hashtag comments. This way functionality isn't outright broken with a new comment notation ## versus #.

Resolves #5356 .

:straight_ruler: Design Decisions

I simply removed the hashtag symbol from the exclusion clause regex for the title, section, and event. I made sure to add test coverage to the timeline test suite and run pnpm test to ensure that it was still working.

:clipboard: Tasks

Make sure you

• [x] :book: have read the contribution guidelines
• [x] :computer: have added necessary unit/e2e tests.
• [ ] :notebook: have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
• [x] :bookmark: targeted develop branch

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 5.74%. Comparing base (8e95c4d) to head (d1a3a84).

Additional details and impacted files

[](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5399?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) ```diff @@ Coverage Diff @@ ## develop #5399 +/- ## ======================================= Coverage 5.74% 5.74% ======================================= Files 277 276 -1 Lines 41899 41888 -11 Branches 489 514 +25 ======================================= Hits 2407 2407 + Misses 39492 39481 -11 ``` | [Flag](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5399/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) | Coverage Δ | | |---|---|---| | [e2e](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5399/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) | `?` | | | [unit](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5399/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) | `5.74% <ø> (+<0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js#carryforward-flags-in-the-pull-request-comment) to find out more. [see 1 file with indirect coverage changes](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5399/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js)