Miscellaneous tweaks

Small tweaks. I'll admit I haven't yet actually tested these beyond making sure it compiles and runs, but I'd be astonished if there are any problems.

Merge Checklist

• I have read CONTRIBUTING.md
  • and
    • my code editor has
      • ESLint support enabled
      • TypeScript support enabled
      • some form of spell checker
        • We suggest using a spell checker compatible with cSpell if possible
    • my changes compile successfully and seem to work properly
    • I am using the simple compiler (simple-compiler.[bat or sh])
    • I am using the normal compiler (compile.[bat or sh])
    • this is my first merge request
    • the changes in this merge request comply with the coding style defined in CONTRIBUTING.md

Changes made

• Changed the method to determine the surgeon's assistant's pronouns in pcSurgeryDegradation to match the method used in electiveSurgery, to avoid the assistant randomly changing genders between passages.
• Provided alternative text to instances of "fondles ${his} breasts" that make more sense with flat chests. Just that particular wording, not a wider approach.
• Rounded up the number of weeks remaining in assignment tutoring, to avoid saying that it should be finished "in approximately no weeks".

Things left to do

• code review (this is done by one or more people other than you)
• final tests
• let Pregmodder know that this is ready for merging