Fix building docs

Author: fnordfish

.github/workflows/pages.yml

@@ -20,9 +20,9 @@ jobs:
       with:
         persist-credentials: false
     - name: Set up Ruby
-      uses: actions/setup-ruby@v1
+      uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '2.7'
+        ruby-version: '3.4'
     - name: Setup python
       uses: actions/setup-python@v1
       with:

_pages/main.py

@@ -0,0 +1,19 @@
+import re
+
+BYEXMAPLE_PROMT_RE=re.compile(r"^(>>|\.\.|=>)( |$)", re.M)
+
+def byexample_repl(matchobj):
+    if matchobj.group(1) == '=>': return '#=> '
+    else: return ''
+
+def define_env(env):
+    """
+    This is the hook for defining variables, macros and filters
+
+    - variables: the dictionary that contains the environment variables
+    - macro: a decorator function, to declare a macro.
+    """
+
+    @env.filter
+    def remove_code_promt(text):
+    	return BYEXMAPLE_PROMT_RE.sub(byexample_repl, text)