refactor: split custom-misc.el into focused modules

custom-misc.el was an incoherent grab-bag, so anything small defaulted to landing there. I split its eight commands by concern. Three moved into new modules: custom-format (region/buffer reformat), custom-counts (word and character counts), and custom-text-transform (fraction glyphs). The other three went to existing homes: the previous-buffer toggle to custom-buffer-file, the delimiter jump to custom-line-paragraph, and the align-regexp space advice with its alignment and fill bindings to custom-whitespace.

The C-; bindings, which-key labels, and the six test files moved with their functions, and custom-misc.el is deleted. No behavior change: every command keeps its name and its C-; key.

1 files changed, 9 insertions, 0 deletions

diff --git a/modules/custom-buffer-file.el b/modules/custom-buffer-file.el
index b10ecd168..261956f37 100644
--- a/modules/custom-buffer-file.el
+++ b/modules/custom-buffer-file.el
@@ -574,5 +574,14 @@ Signals an error if:
     "C-; b <down>"  "resize divider down"))
 
 
+;; --- previous-buffer toggle (formerly in custom-misc.el) ---
+(defun cj/switch-to-previous-buffer ()
+  "Switch to previously open buffer.
+Repeated invocations toggle between the two most recently open buffers."
+  (interactive)
+  (switch-to-buffer (other-buffer (current-buffer) 1)))
+
+(cj/register-command "SPC" #'cj/switch-to-previous-buffer "prev buffer")
+
 (provide 'custom-buffer-file)
 ;;; custom-buffer-file.el ends here.