Msbuilder

[freiburgermsu]

Hello @cshenry !

Here are edits and comments for MSBuilder:

1. unused imports are flagged
   

2. variable names were clarified
   

3. variable definitions are consolidated
   

4. items() is leveraged for greater efficiency
   

5. a new function _reaction_sinks is created from repeated code in the package
   

6. an f-string replaces a formatted string for greater conciseness
   

7. an error message was clarified
   

8. lambda loops were replaced with faster and more concise list comprehension
   

9. numerous and conditions were simplified with an any conditional
   

10. an excessive I/O processing is flagged
    

11. an unused solution variable is removed
    

Thank you so much :)
Andrew