Let's have a look at sentence-based line breaks

In response to review comment:
- #2627 (comment)

chapters/equations.tex

@@ -421,30 +421,27 @@ \subsection{assert}\label{assert}
 This means that \lstinline!assert! can be called as if it were a function with three formal parameters, the third formal parameter has the name \lstinline!level! and the default value \lstinline!AssertionLevel.error!.
 \end{nonnormative}
 
-If the \lstinline!condition! of an assertion is true, \lstinline!message! is not evaluated and
-the procedure call is ignored. If the \lstinline!condition! evaluates to false
-different actions are taken depending on the level input:
+If the \lstinline!condition! of an assertion is true, \lstinline!message! is not evaluated and the procedure call is ignored.
+If the \lstinline!condition! evaluates to false different actions are taken depending on the level input:
 \begin{itemize}
 \item
-  \lstinline!level = AssertionLevel.error!: The current evaluation is aborted. The
-  simulation may continue with another evaluation. If the simulation is aborted, \lstinline!message! indicates the
-  cause of the error.
+  \lstinline!level = AssertionLevel.error!:
+  The current evaluation is aborted.
+  The simulation may continue with another evaluation.
+  If the simulation is aborted, \lstinline!message! indicates the cause of the error.
   \begin{nonnormative}
   Ways to continue simulation with another evaluation include using a shorter step-size, or changing the values of iterationvariables.
   \end{nonnormative}
-  Failed assertions take precedence over successful termination, such
-  that if the model first triggers the end of successful analysis by
-  reaching the stop-time or explicitly with \lstinline!terminate!, but the
-  evaluation with \lstinline!terminal()=true! triggers an assert, the analysis
-  failed.
+  Failed assertions take precedence over successful termination, such that if the model first triggers the end of successful analysis by reaching the stop-time or explicitly with \lstinline!terminate!, but the evaluation with \lstinline!terminal()=true! triggers an assert, the analysis failed.
 \item
-  \lstinline!level = AssertionLevel.warning!: The current evaluation is not aborted.
+  \lstinline!level = AssertionLevel.warning!:
+  The current evaluation is not aborted.
   \lstinline!message! indicates the cause of the warning.
   \begin{nonnormative}
-  It is recommended to report the warning only once when the condition becomes false, and it is reported that the condition is no longer
-  violated when the condition returns to true.  The \lstinline!assert! statement shall have no influence on the behavior of the model.
-  For example, by evaluating the condition and reporting the message only after accepted integrator steps.  \lstinline!condition! needs to
-  be implicitly treated with \lstinline!noEvent! since otherwise events might be triggered that can lead to slightly changed simulation results.
+  It is recommended to report the warning only once when the condition becomes false, and it is reported that the condition is no longer violated when the condition returns to true.
+  The \lstinline!assert! statement shall have no influence on the behavior of the model.
+  For example, by evaluating the condition and reporting the message only after accepted integrator steps.
+  \lstinline!condition! needs to be implicitly treated with \lstinline!noEvent! since otherwise events might be triggered that can lead to slightly changed simulation results.
   \end{nonnormative}
 \end{itemize}