style: Normalize variable expansions in libs.deprecated/*

These files stay deprecated and out of the sourcing path for now, but
apply the same ${var} notation cleanup as the rest of the repo where
it's a pure notation fix. basedir.bash is left untouched: its bug is
a broken escape, not a notation issue, and it mirrors the one already
removed from _helpers.bash.

libs.deprecated/grepp.bash

@@ -1 +1 @@
-grepp() { x=$1; shift; perl -00ne ' print if /'"$x"'/i ' "$*" ; }
+grepp() { x=$1; shift; perl -00ne ' print if /'"${x}"'/i ' "$*" ; }

libs.deprecated/ldif.bash

@@ -12,5 +12,5 @@ function ldifparse ()
 	if (length) print
 		next
 	}
-	{print}' "$FILE"
+	{print}' "${FILE}"
 }

libs.deprecated/path.bash

@@ -1,8 +1,8 @@
 #!/bin/bash
 
 _path_add() {
-    if [ -d "$1" ] && [[ ":$PATH:" != *":$1:"* ]]; then
-        PATH="${PATH:+"$PATH:"}$1"
+    if [ -d "$1" ] && [[ ":${PATH}:" != *":$1:"* ]]; then
+        PATH="${PATH:+"${PATH}:"}$1"
     fi
 }
 

libs.deprecated/prompt_command.bash

@@ -1,8 +1,8 @@
 #!/bin/bash
 
 _prompt_command_add() {
-    if [ -n "$1" ] && [[ ":$PROMPT_COMMAND:" != *":$1:"* ]]; then
-        PROMPT_COMMAND="${PROMPT_COMMAND:+"$PROMPT_COMMAND;"}$1"
+    if [ -n "$1" ] && [[ ":${PROMPT_COMMAND}:" != *":$1:"* ]]; then
+        PROMPT_COMMAND="${PROMPT_COMMAND:+"${PROMPT_COMMAND};"}$1"
     fi
 }
 

libs.deprecated/virtualization.bash

@@ -188,7 +188,7 @@ vm_create_magick2() {
   template=${3}
 
   # Define ressources based on template
-  case $template in
+  case ${template} in
     small)
       vcpus="1,maxvcpus=2"
       memory="1024,maxmemory=2048"
@@ -262,7 +262,7 @@ _hypervisors() {
   if [ -e ~/.ssh/known_hosts ]; then
     known_hypervisors=$(cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e 's/,.*//g' | grep -v "\[" | grep -i hypervisor | uniq)
   fi
-  echo $configured_hypervisors $known_hypervisors
+  echo "${configured_hypervisors}" "${known_hypervisors}"
 }
 
 #complete -W "$(cat ~/.ssh/config | egrep  -i "^\s*host\s+[a-zA-Z]" | sed -e "s/^host\s*//i" | grep -i hypervisor)" hypervisor_connect