fix typos

[Marcofann]

This pull request fixes grammatical errors in comments across several smart contract files and test files. The changes enhance the clarity and professionalism of the codebase by addressing improper usage of "a" and "an."

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Files and Changes

Smart Contract Files

1. BaseModule.sol (Multiple Locations)

   • Corrected "an re-entry" to "a re-entry."

2. ForwarderModule.sol

   • Corrected "an regular" to "a regular."

3. WalletFactory.sol (Versions 2 and 3)

   • Corrected "a operator" to "an operator."

4. LoopringProtocol.sol

   • Corrected "a order" to "an order."

Test Files

1. gnosis.test.ts

   • Corrected "an sig" to "a sig."

2. inheritor.test.ts

   • Corrected "a owner" to "an owner."