cleanup Nim's examples/ directory; closes #7725

examples/extract_keyval_pairs_pegs.nim

@@ -0,0 +1,7 @@
+# Filter key=value pairs from "myfile.txt"
+import pegs
+
+for x in lines("myfile.txt"):
+  if x =~ peg"{\ident} \s* '=' \s* {.*}":
+    echo "Key: ", matches[0],
+         " Value: ", matches[1]