8.7.3 Can you answer these questions?

8.7.3.1 How to capitalize the first letter of each word in the title of a bibtex @misc entry in LaTeX tufte-book class

https://tex.stackexchange.com/landing/r/digest?cta=question&id=631638

I am using the LaTeX tufte-book class and need to figure out how to capitalize the first letter of each word of the title of the TSEliot bibliography entry in the following MWE: 
\documentclass{tufte-... 
[bibtex] [tufte-book]
 

asked by Steven https://tex.stackexchange.com/landing/r/digest?cta=user&id=262003 Score of 1

8.7.3.2 Spacing between two alignment "columns"

https://tex.stackexchange.com/landing/r/digest?cta=question&id=631757

I would like to make the red spacing the same as the blue, i.e. the spacing between two alignment "columns" to be a normal space. How can I do this? 
Here is the code: 
\documentclass[fleqn, ... 
[spacing] [alignment] [columns]
 

asked by IsaKEKW https://tex.stackexchange.com/landing/r/digest?cta=user&id=262171 Score of 1

8.7.3.3 How can I capture and rescan TeX source code while preserving synctex data?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=631887

Let's say I want to replace all a (in source code, not rendered output) in a section with b... 
%! TEX program = lualatex 
\documentclass{article} 
\usepackage{filecontentsdef} 
\begin{document} 
\begin{... 
[luatex] [forward-inverse-search]
 

asked by user202729 https://tex.stackexchange.com/landing/r/digest?cta=user&id=250119 Score of 1