Emacs: Prefer horizontal window split

.emacs.d/lisp/main.el

@@ -167,6 +167,11 @@
 ;; Set man pages to display on a 80 character wide window.
 (setenv "MANWIDTH" "80")
 
+;; Enforce horizontal splitting. 140 means that the window is large enough to
+;; hold 2 other windows of 70 columns.
+(setq split-height-threshold nil)
+(setq split-width-threshold 140)
+
 ;; Windmove mode: easy window switching with Shift+arrows.
 (when (fboundp 'windmove-default-keybindings)
   (windmove-default-keybindings))

.emacs.d/lisp/tool-helm.el

@@ -8,6 +8,8 @@
 ; (helm-autoresize-mode 1)
 (setq helm-follow-mode-persistent t)
 (add-to-list 'helm-sources-using-default-as-input 'helm-source-man-pages)
+;; (setq helm-split-window-default-side 'right)
+(setq helm-reuse-last-window-split-state t)
 
 (setq helm-apropos-fuzzy-match t)
 (setq helm-buffers-fuzzy-matching t)