Add a script to strip trailing whitespace

Obsoletes #1498

scripts/dev/strip_whitespace.py

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Strip trailing whitespace from files in this repo
+
+find qutebrowser scripts tests \
+    -type f \( \
+        -name '*.py' -o \
+        -name '*.feature' -o \
+        -name '*.sh' \
+    \) -exec sed -i 's/ \+$//' {} +

tests/integration/features/editor.feature

@@ -46,7 +46,7 @@ Feature: Opening external editors
                 history:
                 - active: true
                   url: http://localhost:*/data/numbers/2.txt
-                  
+
     Scenario: Editing an URL with count
         Given I have a fresh instance
         When I open data/numbers/1.txt

tests/integration/features/tabs.feature

@@ -863,7 +863,7 @@ Feature: Tab management
         When I open data/title.html
         And I run :buffer "1/2/3"
         Then the error "No matching tab for: 1/2/3" should be shown
-        
+
     Scenario: Using :tab-next after closing last tab (#1448)
         When I set tabs -> last-close to close
         And I run :tab-only