improved f-strings in examples

Author: thomasWeise

bibliography/bibliography.bib

@@ -2398,6 +2398,19 @@ @inbook{PSF2024TSTS
  urldate = {2024-07-25},
 }
 
+@xdata{PSF2024WNIP,
+ volume = {What's New in \python},
+ crossref = {PSF2024P3D}
+}
+
+@inbook{PSF2024WNIP38FSFSDEAD,
+ title = {What's New In \python~3.8: \pglspl{fstrings} Support \pythonil{=} for Self-Documenting Expressions and Debugging},
+ author = a_hettinger_raymond,
+ xdata = {PSF2024WNIP},
+ url = {https://docs.python.org/3/whatsnew/3.8.html#bpo-36817-whatsnew},
+ urldate = {2024-12-01}
+}
+
 @inbook{PTVF2007EAAS,
  title = {1.1~Error, Accuracy, and Stability},
  chapter = {1~Preliminaries},

text/main/basics/simpleDataTypesAndOperations/str/str.tex

@@ -279,7 +279,7 @@
 \pythonil{f"Single braces without expression: \{\{ and \}\}."} simply becomes \pythonil{"Single braces without expression: \{ and \}."}
 
 As final example, let us look at a very cool ability of \pglspl{fstring}\pythonIdx{f-string!=}.
-Often, we want to print an expression together with its result.
+Often, we want to print an expression together with its result~\cite(PSF2024WNIP38FSFSDEAD).
 Earlier, we wrote \pythonil{f"\{5\}\ + \{4\}\ = \{5 + 4\}"} is evaluated to \pythonil{"5 + 4 = 9"}.
 What we actually wanted to print was the expression \pythonil{5 + 4} together with its result.
 This can be done much easier: