Add support for multi-line log messages

src/jat.sh.skel

     #
     # Log internal error unrelated to SUT
     #
-    local msg=$1
+    local line
+    local msg
+    local head=true
+    for line in "$@"; do
+        __jat__show_terror "$line"
+        $head || msg+=$'\n'; head=false
+        msg+="$line"
+    done
     echo "error" >> "$(__jat__sd_path "llog")"
     echo "error" >> "$(__jat__sd_path "P.llog")"
     __jat__log_event TEST_ERROR "$msg"
-    __jat__show_terror "$msg"
 }
 
 jat__log_info() {
     #
     # Log internal info unrelated to SUT
     #
-    local msg=$1
+    local line
+    local msg
+    local head=true
+    for line in "$@"; do
+        __jat__show_tinfo "$line"
+        $head || msg+=$'\n'; head=false
+        msg+="$line"
+    done
     echo "info" >> "$(__jat__sd_path "llog")"
     echo "info" >> "$(__jat__sd_path "P.llog")"
     __jat__log_event SINFO "$msg"
-    __jat__show_tinfo "$msg"
 }
 
 jat__log_warning() {
     #
     # Log internal error unrelated to SUT
     #
-    local msg=$1
+    local line
+    local msg
+    local head=true
+    for line in "$@"; do
+        __jat__show_twarning "$line"
+        $head || msg+=$'\n'; head=false
+        msg+="$line"
+    done
     echo "warning" >> "$(__jat__sd_path "llog")"
     echo "warning" >> "$(__jat__sd_path "P.llog")"
     __jat__log_event TEST_WARNING "$msg"
-    __jat__show_twarning "$msg"
 }
 
 jat__pass() {
     case $value in
         "") echo "    $name: ~" ;;
         *)  echo "    $name: |-"
-            echo "        $value" ;;
+            sed "s/^/        /" <<<"$value" ;;
     esac
 }