Fixed README code blocks

README.md

@@ -32,30 +32,38 @@ API naming convention
 =====================
 
 - Function names are like their [libharu API](https://github.com/libharu/libharu/wiki) pendants but object-oriented and their first letter is lowercase.
-
+```
     // javascript code                     C code
     var pdf = new HPDF();                  HPDF_Doc pdf = HPDF_New (error_handler, NULL);
     var page = pdf.addPage();              HPDF_Page page = HPDF_AddPage(pdf);
     pdf.free();                            HPDF_Free(pdf);
+```
 
 - ``Get``s are ommitted and ``Set``s are kept
-
+```
     // javascript code                     C code
     var width = page.width();              HPDF_REAL width = HPDF_Page_GetWidth(page);
     page.setLineWidth(5);                  HPDF_Page_SetLineWidth(page, 5);
+```
 
 - Use ``undefined`` in Javascript where you would use ``NULL`` in C
+```
     // javascript code                           C code
     var root = pdf.createOutline(undefined,      root = HPDF_CreateOutline (pdf, NULL, "OutlineRoot", NULL);
        "OutlineRoot", undefined);
+```
 
 - Use strings (case irrelevant) in Javascript where you would use constants in C
+```
     // javascript code                           C code
     page.setSize('B5', 'landscape');             HPDF_Page_SetSize(page, HPDF_PAGE_SIZE_B5, HPDF_PAGE_LANDSCAPE);
+```
 
 - Tailing ``NULL``s/``undefined``s can be ommitted
+```
     // javascript code                           C code
     var font = pdf.font('Helvetica');           HPDF_Font font = HPDF_PDF_GetFont(pdf, 'Helvetica', NULL);
+```
 
 - Instead of the error handling function in C ``Exception``s are thrown in Javascript