[web] Added page on code formatting.

web/content/docs/devguide/development-workflows/code-format.md

++++
+date = "2018-02-26T11:00:13+01:00"
+title = "Code style and formatting"
+author = "Lars Bilke"
+weight = 1012
+
+[menu]
+  [menu.devguide]
+    parent = "development-workflows"
++++
+
+We aim for a consistent and readable coding style. You do not need to worry about styling if you use the right tools we present in the following.
+
+## C++
+
+Use [`clang-format`](https://clang.llvm.org/docs/ClangFormat.html). Can be added to be automatically run on save in your editor / IDE:
+
+- [Vim](https://github.com/rhysd/vim-clang-format)
+- [Visual Studio](https://devblogs.microsoft.com/cppblog/clangformat-support-in-visual-studio-2017-15-7-preview-1/)
+- [Visual Studio Code](https://marketplace.visualstudio.com/items?itemName=xaver.clang-format)
+
+Current style is defined in [.clang-format](https://gitlab.opengeosys.org/ogs/ogs/-/blob/master/.clang-format).
+
+## Python
+
+Use [`black`](https://black.readthedocs.io/en/stable/). Can be added to be automatically run on save in your editor / IDE:
+
+- [Vim](https://black.readthedocs.io/en/stable/editor_integration.html#vim)
+- [PyCharm](https://black.readthedocs.io/en/stable/editor_integration.html#pycharm-intellij-idea)
+- [Visual Studio Code](https://code.visualstudio.com/docs/python/editing#_formatting)
+
+`black` is also run by our `pre-commit`-hooks. To run manually:
+
+```bash
+pre-commit run black --all-files
+```

web/content/docs/devguide/development-workflows/code-reviews.md

@@ -2,7 +2,7 @@
 date = "2018-02-26T11:00:13+01:00"
 title = "Code Reviews"
 author = "Lars Bilke"
-weight = 1012
+weight = 1014
 
 [menu]
   [menu.devguide]

web/content/docs/devguide/development-workflows/continuous-integration.md

@@ -2,7 +2,7 @@
 date = "2018-02-26T11:00:13+01:00"
 title = "Continuous Integration"
 author = "Lars Bilke"
-weight = 1013
+weight = 1016
 
 [menu]
   [menu.devguide]

web/content/docs/devguide/development-workflows/development-ides.md

@@ -2,7 +2,7 @@
 date = "2018-02-26T11:00:13+01:00"
 title = "Development IDEs"
 author = "Marc Walther"
-weight = 1014
+weight = 1013
 
 [menu]
   [menu.devguide]