Add <F5> mapping to remove trailing whitespace

Makefile

@@ -51,7 +51,7 @@ endef
 
 define update-ycm
 	@(cd $$(find $(VIMPATH)/pack/ -name youcompleteme) && \
-		git submodule update --init --recursive && \
+		git submodule update --init --recursive --remote && \
 		./install.py --all)
 endef
 
@@ -102,7 +102,7 @@ hard-files:
 
 prepare-plugin:
 	@git submodule init
-	@git submodule update --recursive
+	@git submodule update --recursive --remote
 
 plugin-soft: prepare-plugin
 	$(call soft-install, "$(VIMPATH)/pack", "$(PWD)/pack")

config/06-editor.vim

@@ -11,3 +11,14 @@ set backspace=indent,eol,start
 set expandtab
 set tabstop=4
 set shiftwidth=4
+
+function! Preserve(command)
+    " Preparation: save last search and cursor position
+    let l:winview = winsaveview()
+    let l:old_query = getreg('/')
+    execute 'keepjumps ' . a:command
+    call winrestview(l:winview)
+    call setreg('/', l:old_query)
+endfunction
+
+nmap <F5> :call Preserve('%s/[ \t]*$//')<CR>