Revert "Merge pull request #11906 from JuliaLang/sk/new-doc-city"

This reverts commit bebae84, reversing
changes made to 070d356.

CONTRIBUTING.md

@@ -146,7 +146,7 @@ Make sure that [Travis](http://www.travis-ci.org) greenlights the pull request w
  - Try to [squash](http://gitready.com/advanced/2009/02/10/squashing-commits-with-rebase.html) together small commits that make repeated changes to the same section of code so your pull request is easier to review, and Julia's history won't have any broken intermediate commits. A reasonable number of separate well-factored commits is fine, especially for larger changes.
  - If any conflicts arise due to changes in Julia's `master`, prefer updating your pull request branch with `git rebase` versus `git merge` or `git pull`, since the latter will introduce merge commits that clutter the git history with noise that makes your changes more difficult to review.
  - If you see any unrelated changes to submodules like `deps/libuv`, `deps/openlibm`, etc., try running `git submodule update` first.
- - Avoid committing changes to auto-generated files such as `doc/stdlib/*.rst`, which is a frequent source of conflicts and can be re-generated later.
+ - Avoid committing changes to auto-generated files such as `doc/helpdb.jl`, which is a frequent source of conflicts and can be re-generated later.
  - Descriptive commit messages are good.
  - Using `git add -p` or `git add -i` can be useful to avoid accidentally committing unrelated changes.
  - GitHub does not send notifications when you push a new commit to a pull request, so please add a comment to the pull request thread to let reviewers know when you've made changes.

Makefile

@@ -89,6 +89,7 @@ release-candidate: release test
 	@$(MAKE) -C doc latex SPHINXOPTS="-n" #Rebuild Julia PDF docs pedantically
 	@$(MAKE) -C doc doctest #Run Julia doctests
 	@$(MAKE) -C doc linkcheck #Check all links
+	@$(MAKE) -C doc helpdb.jl #Rebuild Julia online documentation for help(), apropos(), etc...
 
 	@# Check to see if the above make invocations changed anything important
 	@if [ -n "$$(git status --porcelain)" ]; then \
@@ -116,6 +117,9 @@ release-candidate: release test
 	@echo 10. Change master to release-0.X in base/version.jl and base/version_git.sh as in 4cb1e20
 	@echo
 
+$(build_docdir)/helpdb.jl: doc/helpdb.jl | $(build_docdir)
+	@cp $< $@
+
 $(build_man1dir)/julia.1: doc/man/julia.1 | $(build_man1dir)
 	@mkdir -p $(build_man1dir)
 	@cp $< $@
@@ -184,7 +188,7 @@ JULIA_SYSIMG_BUILD_FLAGS += --output-ji $(call cygpath_w,$(build_private_libdir)
 endif
 
 COMMA:=,
-$(build_private_libdir)/sys.o: VERSION $(BASE_SRCS) $(build_private_libdir)/inference.$(SHLIB_EXT)
+$(build_private_libdir)/sys.o: VERSION $(BASE_SRCS) $(build_docdir)/helpdb.jl $(build_private_libdir)/inference.$(SHLIB_EXT)
 	@$(call PRINT_JULIA, cd base && \
 	$(call spawn,$(JULIA_EXECUTABLE)) -C $(JULIA_CPU_TARGET) --output-o $(call cygpath_w,$(build_private_libdir)/sys.o) $(JULIA_SYSIMG_BUILD_FLAGS) -f \
 		-J $(call cygpath_w,$(build_private_libdir)/inference.$(SHLIB_EXT)) sysimg.jl \

base/docs/Docs.jl

@@ -493,7 +493,10 @@ macro repl (ex)
             if $(isfield(ex) ? :(isa($(esc(ex.args[1])), DataType)) : false)
                 $(isfield(ex) ? :(fielddoc($(esc(ex.args[1])), $(ex.args[2]))) : nothing)
             else
-                @doc $(esc(ex))
+                # Backwards-compatible with the previous help system, for now
+                let doc = @doc $(esc(ex))
+                    doc ≠ nothing ? doc : Base.Help.@help_ $(esc(ex))
+                end
             end
         end
     end