7.30.3 Can you answer these questions?

7.30.3.1 Text along path decoration with white background
7.30.3.2 Extra  , or forgotten \endgroup. lstset
7.30.3.3 Fancyhead \rightmark not updating
7.30.3.1 Text along path decoration with white background

https://tex.stackexchange.com/landing/r/digest?cta=question&id=597709

I want to have some text appear along a line but not be obstructed by the line itself. I tried the following: 
\documentclass{standalone} 
\usepackage{pgfplots} 
\pgfplotsset{compat=newest} 
\... 
[tikz-pgf] [pgfplots] [decorations]
 
asked by Tohiko https://tex.stackexchange.com/landing/r/digest?cta=user&id=93163 1 vote
7.30.3.2 Extra  , or forgotten \endgroup. lstset

https://tex.stackexchange.com/landing/r/digest?cta=question&id=597783

I am facing an issue for, nothing yet worked. Yes, the code is okay, it should be good. I reinstalled the complete MiKTeX environment, yet the problem appears. 
\documentclass{article} 
\usepackage{... 
[listings]
 
asked by Janekx https://tex.stackexchange.com/landing/r/digest?cta=user&id=242538 1 vote
answered by Janekx https://tex.stackexchange.com/landing/r/digest?cta=user&id=242538 0 votes
7.30.3.3 Fancyhead \rightmark not updating

https://tex.stackexchange.com/landing/r/digest?cta=question&id=597967

I have suddenly got an issue with fancyhead{\rightmark} not updating to the current chapter/section, cannot figure out what is wrong, see code below, \rightmark is empty for Chapter 1: 
\documentclass{... 
[fancyhdr]
 
asked by John Welsh https://tex.stackexchange.com/landing/r/digest?cta=user&id=242643 1 vote
answered by Simon Dispa https://tex.stackexchange.com/landing/r/digest?cta=user&id=161015 0 votes