Handle spaces in dotfile name

In mkrc, separate the list of files with newlines instead of spaces.
Change the `$IFS` when iterating to handle this.

We hand the file off to rcup, which encodes the file name by replacing
spaces with the bell character (`\a`).

rcup then sends the file name off to lsrc, which decodes the bell back
into a space.

The test makes sure an `a` character is in the filename, in case some
encoding goes wrong. We use tr(1) instead of sed(1) because tr(1)
handles `\a`.

Shoutout to Sublime Text 3 for forcing this issue.

1 files changed, 4 insertions, 1 deletions

diff --git a/bin/rcup.in b/bin/rcup.in
index de11751..932ac56 100755
--- a/bin/rcup.in
+++ b/bin/rcup.in
@@ -260,7 +260,10 @@ handle_command_line() {
   tags="${arg_tags:-$TAGS}"
   DOTFILES_DIRS="${dotfiles_dirs:-$DOTFILES_DIRS}"
   RUN_HOOKS=$run_hooks
-  files="$@"
+  files=
+  for file; do
+    files="$files $(encode "$file")"
+  done
 
   for tag in $tags; do
     LS_ARGS="$LS_ARGS -t $tag"