Bug Report: Incorrect Title Formatting for Hyphenated and Apostrophe Words

Describe the bug

When formatting job titles that include hyphens or apostrophes (e.g., "t-mobile", "coca-cola", "e-commerce"), the TitleCaser returns incorrect results (e.g., "t[mobile", "coca[cola", "e[commerce") due to an incorrect joiner being used when reassembling the split word parts.

To Reproduce

Steps to reproduce the behavior:

1. Use the TitleCaser on strings such as "t-mobile", "coca-cola", or "e-commerce".
2. Execute the tests (e.g., run npm test or a similar command).
3. Observe that the output is incorrect: instead of "T-Mobile", "Coca-Cola", or "E-Commerce", the returned strings contain a "[" character (e.g., "t[mobile").

Expected behavior

The TitleCaser should correctly reassemble the split word parts using the proper delimiter. For instance:

• "t-mobile" should be transformed into "T-Mobile".
• "coca-cola" should be transformed into "Coca-Cola".
• "e-commerce" should be transformed into "E-Commerce".

Screenshots

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(No screenshots provided)

Desktop (please complete the following information):

• OS: macOS / Windows / Linux
• Browser: N/A (issue appears in a Node.js environment)
• Version: v1.7.0

Smartphone (please complete the following information):

• Device: N/A
• OS: N/A
• Browser: N/A
• Version: N/A

Additional context

The bug is caused by the correctTerm function in the TitleCaserUtils class. It uses delimiters.source.charAt(0) to join the parts after splitting the word. When using the default delimiter regex /[-']/, delimiters.source.charAt(0) returns "[" instead of the expected hyphen or apostrophe. The solution was to determine the correct joiner based on whether the original word includes a hyphen or an apostrophe.