[__line/state] Logic fixes in explorer

This commit fixes the incorrectly reported state "wrongposition" if position is
"after" and anchor is present in the file but the line missing.

cdist/conf/type/__line/explorer/state

@@ -1,6 +1,7 @@
 #!/bin/sh -e
 #
 # 2018 Steven Armstrong (steven-cdist at armstrong.cc)
+# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
 #
 # This file is part of cdist.
 #
@@ -19,7 +20,7 @@
 #
 
 if [ -f "$__object/parameter/file" ]; then
-   file="$(cat "$__object/parameter/file")"
+   file=$(cat "$__object/parameter/file")
 else
    file="/$__object_id"
 fi
@@ -55,41 +56,45 @@ function _find(_text, _pattern) {
 BEGIN {
    getline anchor < (ENVIRON["__object"] "/parameter/" position)
    getline pattern < (ENVIRON["__object"] "/parameter/" needle)
-   state = "absent"
+
+   found_line = 0
+   correct_pos = (position != "after" && position != "before")
 }
 {
    if (position == "after") {
       if (match($0, anchor)) {
          getline
          if (_find($0, pattern)) {
-            state = "present"
+            found_line++
+            correct_pos = 1
+            exit 0
          }
-         else {
-            state = "wrongposition"
-         }
-         exit 0
+      } else if (_find($0, pattern)) {
+         found_line++
       }
-   }
-   else if (position == "before") {
+   } else if (position == "before") {
       if (_find($0, pattern)) {
+         found_line++
          getline
          if (match($0, anchor)) {
-            state = "present"
+            correct_pos = 1
+            exit 0
          }
-         else {
-            state = "wrongposition"
-         }
-         exit 0
       }
-   }
-   else {
+   } else {
       if (_find($0, pattern)) {
-         state = "present"
+         found_line++
          exit 0
       }
    }
 }
 END {
-   print state
+   if (found_line && correct_pos) {
+      print "present"
+   } else if (found_line) {
+      print "wrongposition"
+   } else {
+      print "absent"
+   }
 }
 ' "$file"