slight tuto updates + ParsingError export

Author: jcaillau

docs/src/tutorial-basic-example-f.md

@@ -43,17 +43,14 @@ using OptimalControl
 Then, we can define the problem
 
 ```@example main
-t0 = 0
-tf = 1
-
 A = [ 0 1
       0 0 ]
 B = [ 0
       1 ]
 
 ocp = Model()
 
-time!(ocp, [t0, tf])
+time!(ocp, [ 0, 1 ])
 state!(ocp, 2)
 control!(ocp, 1)
 

docs/src/tutorial-basic-example.md

@@ -43,15 +43,12 @@ using OptimalControl
 Then, we can define the problem
 
 ```@example main
-t0 = 0
-tf = 1
-
 @def ocp begin
-    t ∈ [ t0, tf ], time
+    t ∈ [ 0, 1 ], time
     x ∈ R², state
     u ∈ R, control
-    x(t0) == [-1, 0]
-    x(tf) == [0, 0]
+    x(0) == [-1, 0]
+    x(1) == [0, 0]
     ẋ(t) == A * x(t) + B * u(t)
     ∫( 0.5u(t)^2 ) → min
 end

src/OptimalControl.jl

@@ -52,6 +52,7 @@ export is_time_independent, is_time_dependent, is_min, is_max, is_variable_depen
 export Lie, @Lie, Poisson, Lift, ⋅, ∂ₜ
 export @def
 export ct_repl
+export ParsingError
 
 # CTProblems
 export ProblemsDescriptions, Problem, Problems, @ProblemsDescriptions, @Problems