Configure the interface and editing behaviour a bit

editor.el

@@ -0,0 +1,22 @@
+;; Automatically reload files if modified outside of the editor.
+(global-auto-revert-mode)
+
+;; Overwrite selected text when typing.
+(delete-selection-mode)
+
+;; Display line numbers.
+(global-display-line-numbers-mode)
+
+;; Display a ruler in the 80th column.
+(setq-default display-fill-column-indicator-column 80)
+(add-hook 'prog-mode-hook #'display-fill-column-indicator-mode)
+(add-hook 'text-mode-hook #'display-fill-column-indicator-mode)
+
+;; Whitespace settings:
+;;  - Tabs are 4 space characters (as the gods intended)
+;;  - Ensure a newline character is present at the end files when saving
+;;  - Clean up extraneous whitespace when saving
+(setq-default indent-tabs-mode nil
+              tab-width        4)
+(setq require-final-newline t)
+(add-hook 'before-save-hook 'whitespace-cleanup)

init.el

@@ -38,5 +38,7 @@
 
 ;; Load all user-defined configuration files:
 
+(load-user-file "editor.el")
+(load-user-file "interface.el")
 (load-user-file "key-bindings.el")
 (load-user-file "typography.el")

interface.el

@@ -0,0 +1,26 @@
+;; Hide the menu bar.
+(menu-bar-mode -1)
+
+;; Don't use double-spaces after periods.
+(setq sentence-end-double-space nil)
+
+;; Use unicode ellipses, because they're nicer.
+(setq truncate-string-ellipsis  "…")
+
+;; Don't require full yes/no answers, allow y/n instead.
+(fset 'yes-or-no-p 'y-or-n-p)
+
+;; Open new windows to the right, not on the bottom.
+(setq split-height-threshold nil
+      split-width-threshold  0)
+
+;; Scroll line-by-line, rather than jumping around haphazardly.
+(setq scroll-conservatively           10000
+      scroll-margin                       0
+      scroll-preserve-screen-position     1)
+
+;; Display the column and line numbers of the cursor in the mode line.
+(column-number-mode)
+
+;; Display the file size in the mode line.
+(size-indication-mode)