doco changes

Author: soniah

lib/jtc_guide.hpp

@@ -185,6 +185,7 @@ std::string GuideJtc::jtc_examples_{R"(
   * Some examples and explanations:
   * - for a complete user guide visit:
   *   https://github.com/ldn-softdev/jtc/blob/master/User%20Guide.md
+  * hint: use -ddd (verbose debugging) to better understand these examples
 
  Consider following source JSON (stored in the file example.json):
     {

lib/wp_guide.hpp

@@ -115,11 +115,11 @@ a. Subscript lexemes: enclosed into square braces '[', ']', their meaning depend
 
 b. search lexemes: enclosed into angular braces '<', '>', instruct to perform a recursive (or a
    non-recursive) search under a given JSON tree point; following notation forms are possible:
-   '<txt>', '<txt>S', '<txt>N', '<txt>SN'
+   '<>', '<txt>', '<txt>S', '<txt>N', '<txt>SN'
    and the respective non-recursive search lexeme forms:
    '>txt<', '>txt<S', '>txt<N', '>txt<SN'
-   where txt - is any text to search for, S - is an optional one letter suffix, N - is an optional
-   quantifier, which comes in several variants
+   where txt - is any text to search for (or '<>' match anything), S - is an optional one
+   letter suffix, N - is an optional quantifier, which comes in several variants
    - if a lexeme is given using '<..>' encasement, then a *recursive* search applied off the
      current JSON node, otherwise (i.e. '>..<' encasement given) - a *non-recursive* search is
      performed among immediate JSON node's children only