refactor(_parse_{help,usage}): remove redundant quote/dequote

Author: akinomyoga

bash_completion

@@ -1097,7 +1097,7 @@ _parse_help()
     shopt -s lastpipe
     set -o noglob
 
-    eval local cmd="$(quote "$1")"
+    local cmd=$1
     local line rc=1
     {
         case $cmd in
@@ -1134,7 +1134,7 @@ _parse_usage()
     shopt -s lastpipe
     set -o noglob
 
-    eval local cmd="$(quote "$1")"
+    local cmd=$1
     local line match option i char rc=1
     {
         case $cmd in