diff --git a/chapters/operatorsandexpressions.tex b/chapters/operatorsandexpressions.tex
index 304ca1a62..4b2353f19 100644
--- a/chapters/operatorsandexpressions.tex
+++ b/chapters/operatorsandexpressions.tex
@@ -857,27 +857,33 @@ \subsubsection{spatialDistribution}\label{spatialdistribution}
    * also known as "short-circuit evaluation of x and y".
    */
   if positiveVelocity then
-    out1 := interpolate(points, values, 1-(x-x0));
+    out1 := interpolate(points, values, 1 - (x - x0));
     out0 := values[1]; // similar to in0 but avoiding algebraic loop
   else
-    out0 := interpolate(points, values, 0-(x-x0));
+    out0 := interpolate(points, values, 0 - (x - x0));
     out1 := values[end]; // similar to in1 but avoiding algebraic loop
   end if;
   when <acceptedStep> then
-    if x>x0 then
+    if x > x0 then
       m := size(points, 1);
       while m > 0 <and then> points[m] + (x - x0) >= 1 loop
-        m := m-1;
+        m := m - 1;
       end while;
-      values := cat(1, {in0}, values[1:m], {interpolate(points, values,1-(x-x0))});
+      values := cat(1,
+                    {in0},
+                    values[1:m],
+                    {interpolate(points, values, 1 - (x - x0))});
       points := cat(1, {0}, points[1:m] .+ (x-x0), {1});
-    elseif x<x0 then
+    elseif x < x0 then
       m := 1;
       while m < size(points, 1) <and then> points[m] + (x - x0) <= 0 loop
-        m := m+1;
+        m := m + 1;
       end while;
-      values := cat(1, {interpolate(points, values, 0 - (x - x0))}, values[m:end], {in1});
-      points := cat(1, {0}, points[m:end] .+ (x-x0), {1});
+      values := cat(1,
+                    {interpolate(points, values, 0 - (x - x0))},
+                    values[m:end],
+                    {in1});
+      points := cat(1, {0}, points[m:end] .+ (x - x0), {1});
     end if;
     x0 := x;
   end when;