add overload to utils::print() so it can be used without FILE pointer

src/utils.cpp

@@ -274,6 +274,11 @@ void utils::print(FILE *fp, const std::string &mesg)
   fputs(mesg.c_str(), fp);
 }
 
+void utils::print(const std::string &mesg)
+{
+  fputs(mesg.c_str(), stdout);
+}
+
 void utils::fmtargs_print(FILE *fp, fmt::string_view format, fmt::format_args args)
 {
   print(fp, fmt::vformat(format, args));

src/utils.h

@@ -151,7 +151,7 @@ output are compressed to a single blank by calling :cpp:func:`strcompress()`
 
 \endverbatim
    *
-   * This function implements a version of fprintf() that uses {fmt} formatting
+   * This function implements a version of (f)printf() that uses {fmt} formatting
    *
    *  \param fp     stdio FILE pointer
    *  \param format format string of message to be printed
@@ -163,12 +163,32 @@ output are compressed to a single blank by calling :cpp:func:`strcompress()`
   }
 
   /*! \overload
+   *
+   * Print to stdout without specifying the FILE pointer.
+   *
+   *  \param mesg   string with message to be printed */
+  template <typename... Args> void print(const std::string &format, Args &&...args)
+  {
+    fmtargs_print(stdout, format, fmt::make_format_args(args...));
+  }
+
+  /*! \overload
+   *
+   *  Print string message without format
    *
    *  \param fp     stdio FILE pointer
    *  \param mesg   string with message to be printed */
 
   void print(FILE *fp, const std::string &mesg);
 
+  /*! \overload
+   *
+   *  Print string message without format to stdout
+   *
+   *  \param mesg   string with message to be printed */
+
+  void print(const std::string &mesg);
+
   /*! Return text redirecting the user to a specific paragraph in the manual
    *
    * The LAMMPS manual contains detailed explanations for errors and