obabel: fix typo

[Acetylsalicylsaeure]

insert forgotten "

• [x] The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• [x] The page(s) have at most 8 examples.
• [x] The page description(s) have links to documentation or a homepage.
• [x] The page(s) follow the content guidelines.
• [x] The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[tldr-bot]

The build for this PR failed with the following error(s):

pages/linux/mopac.md:10: TLDR015 Example descriptions should start with a capital letter
pages/linux/mopac.md:10: TLDR005 Example descriptions should end in a colon with no trailing characters
pages/linux/mopac.md:14: TLDR015 Example descriptions should start with a capital letter

Please fix the error(s) and push again.

[sebastiaanspeck]

Do you want to add mopac in the same PR or is that done by mistake?

[spageektti]

@Acetylsalicylsaeure you need to create another branch in your fork to submit another PR for the new page

[Acetylsalicylsaeure]

Do you want to add mopac in the same PR or is that done by mistake?

my bad, forgot to branch

removed the page for mopac

[spageektti]

For future I suggest not using main branch to avoid mistakes.

[kbdharun]

Nice catch, thanks for the fix.