[fix] For _devbuild/gen/help_.py

spec/builtin-completion requires 'false' in the help topics

doc/ref: Add help terminology

build/doc.sh

@@ -373,15 +373,13 @@ cards-from-indices() {
 cards-from-chapters() {
   ### Do all cards at once
 
-  # TODO: We need to re-indent <code> blocks here, etc.
-
-  local py_out=$CODE_DIR/help_.py
+  # TODO: unify the list of help topics
+  local py_out=$CODE_DIR/ignored.py
   # h4 tag for these
   _make-help cards-from-chapter $TEXT_DIR $py_out h4 \
     $HTML_DIR/doc/osh-help.html $HTML_DIR/doc/ysh-help.html
 
-  # TODO: unify the list of help topics
-  local py_out=$CODE_DIR/fixme.py
+  local py_out=$CODE_DIR/help_.py
   # h3
   _make-help cards-from-chapter $TEXT_DIR $py_out h3 \
     $HTML_DIR/doc/ref/chap-*.html

doc/osh-help.md

@@ -729,6 +729,16 @@ Examples:
     help osh-usage     # identical to osh --help
     help ysh-usage     # ditto
 
+Help terminology:
+
+    Oils Reference: underlies 'help' builtin, and published as HTML
+    Chapter:        An HTML doc that's part of the reference
+                    May apply to OSH, YSH or both
+    Section:        <h2> in a chapter
+    Topic:          <h3> in a chapter, with name like 'doc-comment'
+                    May apply to OSH, YSH or both
+    Card:           Each topic is exported as a "card"
+
 All docs, including this reference:
 
     https://www.oilshell.org/release/$VERSION/doc/