fix broken links

hugo/content/dev/build.md

@@ -24,6 +24,6 @@ Of these, clang-format is not controlled by `make`, but must be run manually.
 
 Optionally, the following tools can be needed:
 - Graphviz, to visualize project hierarchy with doxygen;
-- hugo, to generate [web documentation](/howto/contribute-to-documentation).
+- hugo, to generate [web documentation](/dev/webdoc).
 
 {{% children  %}}

hugo/content/ex/result/export/axes-in-different-units/index.md

@@ -6,7 +6,7 @@ weight = 20
 ### Plotting with axes in different units
 
 In this example we demonstrate how to plot intensity data with detector axes expressed in different units. It serves as a supporting example to the
-[Accessing simulation results](/ex/result/export/more) tutorial.
+[Accessing simulation results](/ex/result/export) tutorial.
 
 * The standard [Cylinders in DWBA](/ex/sim/gisas)
 sample is used to setup the simulation.

hugo/content/py/syntax.md

@@ -68,7 +68,7 @@ result = simulation.simulate()
 ```
 construct a sample and instrument model and run a simulation.
 The function `simulate()` returns a
-[Datafield](/ref/sim/simulation-result) instance.
+[Datafield](/ref/result/datafield) instance.
 
 The line
 ```python