Make __fisher_key_bindings_undo smarter. Close #121.

Until now key_bindings.fish only allowed simple bind <args>
staments and would fail for conditional statements, etc.

functions/__fisher_key_bindings_disable.fish

@@ -1,17 +1,11 @@
 function __fisher_key_bindings_disable -a plugin user_key_bindings
-    fish_indent < $fisher_binds \
-        | __fisher_key_bindings_undo $plugin \
-        | source
+    fish_indent < $fisher_binds | __fisher_key_bindings_undo $plugin | source ^ /dev/null
 
-    __fisher_key_bindings_delete $plugin \
-        > $fisher_binds.tmp \
-        < $fisher_binds
+    __fisher_key_bindings_delete $plugin > $fisher_binds.tmp < $fisher_binds
 
     command mv -f $fisher_binds.tmp $fisher_binds
 
     if test ! -s $fisher_binds
-        debug "Remove fisherman key bindings '%s'" "$user_key_bindings"
-
         sed -i.tmp '/__fisher_key_bindings/d' $user_key_bindings
         command rm -f $user_key_bindings.tmp
     end

functions/__fisher_key_bindings_undo.fish

@@ -1,3 +1,3 @@
 function __fisher_key_bindings_undo -a plugin
-    sed -n "/##$plugin##/,/##$plugin##/{s/bind /bind -e /p;};"
+    sed -n "/##$plugin##/,/##$plugin##/{s/^ *bind /bind -e /p;};"
 end

test/fixtures/key-bindings/fisher_key_bindings.fish

@@ -1,6 +1,6 @@
 ##foo##
-echo bind foo
+bind foo
 ##foo##
 ##bar##
-echo bind bar
+bind bar
 ##bar##

test/key-bindings-disable.fish

@@ -7,6 +7,10 @@ function -S setup
 
     set -g fisher_binds $path/fisher_key_bindings.fish
 
+    function bind
+        printf "%s\n" "bind $argv"
+    end
+
     for plugin in foo bar baz
         __fisher_key_bindings_disable $plugin $path/user_key_bindings.fish >> $path/key_bindings_log
     end
@@ -14,6 +18,7 @@ end
 
 function -S teardown
     rm -rf $path
+    functions -e bind
 end
 
 test "$TESTNAME - Remove bindings from fisher key bindings file"