doc: add custom CSS to make tables wrap their text properly

Author: ntamas

doc/source/_static/custom.css

@@ -0,0 +1,10 @@
+/* override table width restrictions */
+.wy-table-responsive table td, .wy-table-responsive table th {
+    white-space: normal;
+}
+
+.wy-table-responsive {
+    margin-bottom: 24px;
+    max-width: 100%;
+    overflow: visible;
+}

doc/source/_static/other.css

@@ -136,7 +136,8 @@ def get_igraph_version():
 # Inspired by pydoctor's RTD page itself
 # https://github.com/twisted/pydoctor/blob/master/docs/source/conf.py
 html_theme = "sphinx_rtd_theme"
-html_static_path = []
+html_static_path = ["_static"]
+html_css_files = ["custom.css"]
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".