docs: fix use of default values in PDESystem

Author: sathvikbhagavan

docs/src/tutorials/params.md

@@ -23,7 +23,8 @@ domains = [t ∈ Interval(0.0, 1.0),
     x ∈ Interval(0.0, 1.0)]
 
 @named pdesys = PDESystem(
-    eqs, bcs, domains, [t, x], [u(t, x), v(t, x)], [Dn => 0.5, Dp => 2])
+    eqs, bcs, domains, [t, x], [u(t, x), v(t, x)],
+    [Dn, Dp]; defaults = Dict(Dn => 0.5, Dp => 2.0))
 
 discretization = MOLFiniteDifference([x => 0.1], t)
 
@@ -74,7 +75,8 @@ domains = [t ∈ Interval(0.0, 1.0),
     x ∈ Interval(0.0, 1.0)]
 
 @named pdesys = PDESystem(
-    eqs, bcs, domains, [t, x], [u(t, x), v(t, x)], [Dn => 0.5, Dp => 2.0])
+    eqs, bcs, domains, [t, x], [u(t, x), v(t, x)],
+    [Dn, Dp]; defaults = Dict(Dn => 0.5, Dp => 2.0))
 
 discretization = MOLFiniteDifference([x => 0.1], t)
 

docs/src/tutorials/sispde.md

@@ -68,8 +68,8 @@ domains = [t ∈ Interval(0.0, 10.0),
     x ∈ Interval(0.0, 1.0)]
 
 # PDE system
-@named pdesys = PDESystem(eq, bcs, domains, [t, x], [S(t, x), I(t, x)],
-    [dS => 0.5, dI => 0.1, brn => 3, ϵ => 0.1])
+@named pdesys = PDESystem(eq, bcs, domains, [t, x], [S(t, x), I(t, x)], [dS, dI, brn, ϵ];
+    defaults = Dict(dS => 0.5, dI => 0.1, brn => 3, ϵ => 0.1))
 
 # Method of lines discretization
 # Need a small dx here for accuracy